Enhanced installation instructions to README.rst

This commit mainly contains better installation instructions (#255).
Additionally 'Robot Framework' was made a link and trailing whitespace
removed from few places.

After writing the new instructions, I noticed that there already were
better instructions in INSTALL.rst. I decided to commit my changes anyway
because they contain better pip examples and explain proxy configuration.
Instructions in INSTALL.rst were also partly outdated.

Having these new instructions and old instructions in INSTALL.rst obviously
doesn't make any sense. We need discuss do we want to keep more detailed
instructions in README or have separate INSTALL. Let's continue that
discussion in issue #255.

README.rst

@@ -11,11 +11,11 @@ Selenium 2 (WebDriver) library for Robot Framework
 Introduction
 ------------
 
-Selenium2Library is a web testing library for Robot Framework
+Selenium2Library is a web testing library for `Robot Framework`_
 that leverages the `Selenium 2 (WebDriver)`_ libraries from the
 Selenium_ project.
 
-It is modeled after (and forked from) the SeleniumLibrary_ library, 
+It is modeled after (and forked from) the SeleniumLibrary_ library,
 but re-implemented to use Selenium 2 and WebDriver technologies.
 
 - More information about this library can be found on the Wiki_ and in the `Keyword Documentation`_.
@@ -26,10 +26,73 @@ but re-implemented to use Selenium 2 and WebDriver technologies.
 Installation
 ------------
 
-You can install Selenium2Library using pip, with the following command
+Using ``pip``
+'''''''''''''
+
+The recommended installation method is using
+`pip <http://pip-installer.org>`__::
 
     pip install robotframework-selenium2library
 
+The main benefit of using ``pip`` is that it automatically installs all
+dependencies needed by the library. Other nice features are easy upgrading
+and support for un-installation::
+
+    pip install --upgrade robotframework-selenium2library
+    pip uninstall robotframework-selenium2library
+
+Notice that using ``--upgrade`` above updates both the library and all
+its dependencies to the latest version. If you want, you can also install
+a specific version or upgrade only the Selenium tool used by the library::
+
+    pin install robotframework-selenium2library==1.4.1
+    pip install --upgrade selenium
+    pip install selenium==2.34
+
+Proxy configuration
+'''''''''''''''''''
+
+If you are behind a proxy, you can use ``--proxy`` command line option
+or set ``http_proxy`` and/or ``https_proxy`` environment variables to
+configure ``pip`` to use it. If you are behind an authenticating NTLM proxy,
+you may want to consider installing `CNTML <http://cntlm.sourceforge.net>`__
+to handle communicating with it.
+
+For more information about ``--proxy`` option and using pip with proxies
+in general see:
+
+- http://pip-installer.org/en/latest/usage.html
+- http://stackoverflow.com/questions/9698557/how-to-use-pip-on-windows-behind-an-authenticating-proxy
+- http://stackoverflow.com/questions/14149422/using-pip-behind-a-proxy
+
+Manual installation
+'''''''''''''''''''
+
+If you do not have network connection or cannot make proxy to work, you need
+to resort to manual installation. This requires installing both the library
+and its dependencies yourself.
+
+1) Make sure you have `Robot Framework installed
+   <http://code.google.com/p/robotframework/wiki/Installation>`__.
+
+2) Download source distributions (``*.tar.gz``) for the library and its
+   dependencies:
+
+   - https://pypi.python.org/pypi/robotframework-selenium2library
+   - https://pypi.python.org/pypi/selenium
+   - https://pypi.python.org/pypi/decorator
+
+3) Extract each source distribution to a temporary location.
+
+4) Go each created directory from the command line and install each project
+   using::
+
+       python setup.py install
+
+If you are on Windows, and there are Windows installers available for
+certain projects, you can use them instead of source distributions.
+Just download 32bit or 64bit installer depending on your system,
+double-click it, and follow the instructions.
 
 Directory Layout
 ----------------
@@ -47,7 +110,7 @@ src/
 Usage
 -----
 
-To write tests with Robot Framework and Selenium2Library, 
+To write tests with Robot Framework and Selenium2Library,
 Selenium2Library must be imported into your Robot test suite.
 See `Robot Framework User Guide`_ for more information.
 
@@ -63,7 +126,7 @@ using Selenium2Library. To run the demo, run::
 E.g.::
 
 	python demo/rundemo.py demo/login_tests
-	
+
 Getting Help
 ------------
 The `user group for Robot Framework`_ is the best place to get help. Consider including in the post:
@@ -72,6 +135,7 @@ The `user group for Robot Framework`_ is the best place to get help. Consider in
 - Version number of Selenium2Library, Robot Framework, and Selenium
 - Traceback or other debug output containing error information
 
+.. _Robot Framework: http://robotframework.org
 .. _Selenium: http://selenium.openqa.org
 .. _Selenium 2 (WebDriver): http://seleniumhq.org/docs/03_webdriver.html
 .. _SeleniumLibrary: http://code.google.com/p/robotframework-seleniumlibrary/