some readme fixes

README.md

@@ -25,10 +25,20 @@ sqlite3
 libsqlite3-dev
 ```
 
+If your chosen distro is still on bluez 4 please choose a more up to date distro.  Bluez 5 was released in 2012 and is required.
+
 On Debian-based systems, these packages can be installed with the following command line:
 
 ```sudo apt-get install bluez bluez-test-scripts python-bluez python-dbus libsqlite3-dev ubertooth```
 
+To install the needed gems it may be helpful (but not required) to use bundler:
+
+```
+sudo apt-get install ruby-dev bundler
+(from inside the blue_hydra directory)
+bundle install
+```
+
 In addition to the Bluetooth packages listed above you will need to have Ruby
 version 2.1 or higher installed, as well as Ruby development headers for gem compilation (on
 Debian based systems, this is the `ruby-dev` package). With ruby installed add the `bundler` gem and