new ProfilingUtils class to help measure performances
Profiling integration to measure app starting time
make some methods public so we can measure multiple app areas simultaneously
Merge pull request #1291 from wordpress-mobile/feature/profiling-utils

Profiling utils to help measure performances
Merge branch 'develop' of https://github.com/wordpress-mobile/WordPress-Android into issue/1246-preloading-Stats

Conflicts:
	src/org/wordpress/android/WordPress.java
Fix merge conflicts