Use modern icons in info and alert dialogs for ICS+
Merge pull request #921 from liliakai/master

Add contributing.md // FREEBIE
Fix the send button's touch highlight color

Introduce a generic touch highlight background drawable, and use the
proper shades of blue (and gray on v19+).
Use the touch highlight background for the emoji toggle
Add touch highlight to contact photos
Use unified touch highlight in import & export
Replace the attachment dialog header icon with something modern
End conversation selection action mode if all deselected

This seems to be common convention in most apps.
Add missing spaces
a little typo mistake
fixed some hardcoded strings
Make default group avatar icon actually work.
Merge pull request #648 from veeti/tweaks-and-polish

Assorted tweaks and polish
Merge pull request #905 from benalbrecht/dialog_icons

Use modern icons in info and alert dialogs for ICS+
Show confirmation box before disabling push messages
Added the color white to the notification colors of the LED.
add new string ViewIdentityActivity_my_identity_fingerprint
Merge pull request #941 from Wikinaut/add-new-string-ViewIdentityActivity_my_identity_fingerprint

add new string ViewIdentityActivity_my_identity_fingerprint
Build native code for multiple architectures.

 * Include native libs without requiring intermediate .jar.
 * Fix build warnings; use latest build tools.
Add libcurve25519 bins.
// FREEBIE