Merge pull request #131 from rdsubhas/master

Fix SecureRandom break in Android 4.2
adds fix for rapidftr/tracker#30 better error messages.

This fix adds a toast notification if there is no connectivity and an online login is attempted.
Merge pull request #132 from ctumwebaze/master

adds fix for rapidftr/tracker#30 better error messages.
rapidftr/tracker#95 Enable keystore signing
Adding Integration Tests for Navigation
Merge pull request #133 from tomclement/master

Adding Integration Tests for Navigation
Update android support library to latest version