add ko-fi button, readme cleanup

README.md

@@ -1,6 +1,8 @@
 # Headless [![Travis CI status](https://secure.travis-ci.org/leonid-shevtsov/headless.png)](http://travis-ci.org/leonid-shevtsov/headless)
 
-Headless is *the* Ruby interface for Xvfb. It allows you to create a headless display straight from Ruby code, hiding the low-level action.
+<a href='https://ko-fi.com/X8X19BQH' target='_blank'><img height='36' style='border:0px;height:36px;' src='https://az743702.vo.msecnd.net/cdn/kofi1.png?v=0' border='0' alt='Buy Me a Coffee at ko-fi.com' /></a>
+
+Headless is _the_ Ruby interface for Xvfb. It allows you to create a headless display straight from Ruby code, hiding the low-level action.
 It can also capture images and video from the virtual framebuffer. For example, you can record screenshots and screencasts of your failing integration specs.
 
 I created it so I can run Selenium tests in Cucumber without any shell scripting. Even more, you can go headless only when you run tests against Selenium.
@@ -33,7 +35,7 @@ require 'selenium-webdriver'
 Headless.ly do
   driver = Selenium::WebDriver.for :firefox
   driver.navigate.to 'http://google.com'
-  puts driver.title 
+  puts driver.title
 end
 ```
 
@@ -80,11 +82,11 @@ Headless.new(display: 100, destroy_at_exit: false).start
 # test_suite_that_could_be_ran_multiple_times.rb
 Headless.new(display: 100, reuse: true, destroy_at_exit: false).start
 
-# reap_headless.rb 
+# reap_headless.rb
 headless = Headless.new(display: 100, reuse: true)
 headless.destroy
 
-# kill_headless_without_waiting.rb 
+# kill_headless_without_waiting.rb
 headless = Headless.new
 headless.destroy_without_sync
 ```
@@ -136,35 +138,35 @@ headless = Headless.new(:video => { :frame_rate => 12, :codec => 'libx264' })
 Available options:
 
 * :codec - codec to be used by ffmpeg
-* :frame_rate      - frame rate of video capture
-* :provider        - ffmpeg provider - either :libav (default) or :ffmpeg
-* :provider_binary_path - Explicit path to avconv or ffmpeg.  Only required when the binary cannot be discovered on the system $PATH.
-* :pid_file_path   - path to ffmpeg pid file, default: "/tmp/.headless_ffmpeg_#{@display}.pid"
-* :tmp_file_path   - path to tmp video file,  default: "/tmp/.headless_ffmpeg_#{@display}.mov"
-* :log_file_path   - ffmpeg log file,         default: "/dev/null"
-* :extra           - array of extra ffmpeg options, default: [] 
+* :frame_rate - frame rate of video capture
+* :provider - ffmpeg provider - either :libav (default) or :ffmpeg
+* :provider_binary_path - Explicit path to avconv or ffmpeg. Only required when the binary cannot be discovered on the system $PATH.
+* :pid*file_path - path to ffmpeg pid file, default: "/tmp/.headless_ffmpeg*#{@display}.pid"
+* :tmp*file_path - path to tmp video file, default: "/tmp/.headless_ffmpeg*#{@display}.mov"
+* :log_file_path - ffmpeg log file, default: "/dev/null"
+* :extra - array of extra ffmpeg options, default: []
 
 ## Taking screenshots
 
 Call `headless.take_screenshot` to take a screenshot. It needs two arguments:
 
-- file_path - path where the image should be stored
-- options - options, that can be:
-    :using - :imagemagick or :xwd, :imagemagick is default, if :imagemagick is used, image format is determined by file_path extension
+* file_path - path where the image should be stored
+* options - options, that can be:
+  :using - :imagemagick or :xwd, :imagemagick is default, if :imagemagick is used, image format is determined by file_path extension
 
 Screenshots can be taken by either using `import` (part of `imagemagick` library) or `xwd` utility.
 
-`import` captures a screenshot and saves it in the format of the specified file. It is convenient but not too fast as 
+`import` captures a screenshot and saves it in the format of the specified file. It is convenient but not too fast as
 it has to do the encoding synchronously.
 
-`xwd` will capture a screenshot very fast and store it in its own format, which can then be converted to one 
+`xwd` will capture a screenshot very fast and store it in its own format, which can then be converted to one
 of other picture formats using, for example, netpbm utilities - `xwdtopnm <xwd_file> | pnmtopng > capture.png`.
 
 To install the necessary libraries on ubuntu:
 
 `import` - run `sudo apt-get install imagemagick`
 `xwd` - run `sudo apt-get install X11-apps` and if you are going to use netpbm utilities for image conversion - `sudo apt-get install netpbm`
- 
+
 ## Troubleshooting
 
 ### `/tmp/.X11-unix` is missing
@@ -181,7 +183,7 @@ sudo chmod 1777 /tmp/.X11-unix
 sudo chown root /tmp/.X11-unix/
 ```
 
-Note that you may need to run these commands after every reboot, too. 
+Note that you may need to run these commands after every reboot, too.
 
 ### Display socket is taken but lock file is missing
 
@@ -191,7 +193,6 @@ This means that there is an X server that is taking up the chosen display number
 
 If video is not recording, and there are no visible exceptions, try passing the following option to Headless to figure out the reason: `Headless.new(video: {log_file_path: STDERR})`. In particular, there are some issues with the version of avconv packaged with Ubuntu 12.04 - an outdated release, but still in use on Travis.
 
-
 ##[Contributors](https://github.com/leonid-shevtsov/headless/graphs/contributors)
 
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