Added 3 Assets and attempts to load

Added the icon for the comments button. Attempts to load have the files
have been successful, but we're probably going to need a custom view for
the icons in order to have them show up properly.
Merge branch 'android' of github.com:EJEHardenberg/GreenUp into android
Added action bar icons and image script

I have created small script that generates the appropriate quality image
for each of the android files using rsvg-convert. If rsvg-convert is not
installed on your system you will need to install the library
librsvg2-bin and place it into your path.

Also included is the placement of the svg's into the assets folder and
the generated images in each of their respective areas. I will probably
refactor the script to resize and place the svg's into both android and
ios client libraries.

@popwarfour If you get me a spec of where each image should be placed I
will write the apppropriate file generation code to create whatever dpi
or size images you need for the ios client.

@milus16 If you see something wrong within the images being generated
let me know and I will fix whatever you suggest.