wait for Post activity to load
new test reproducing #685
fix #685: check for null value
fix #687: replace "attempting to..." strings
fix #688: use _commitAllowingStateLoss()_ on fragment transaction
fix potential bugs related to #688
Merge pull request #686 from wordpress-mobile/issue/685-wphtml-npe

fixes #685
remove useless ProgressDialog titles
fix a NPE when activity is detached
Merge pull request #690 from wordpress-mobile/issue/687-replace-attempting-strings

fix #687: replace "attempting to..." strings
Merge pull request #689 from wordpress-mobile/issue/688-timeout-error-on-activity-detached

fix #688 - timeout error on activity detached
Merge branch 'develop' into feature/japan-testing

Conflicts:
	src/org/wordpress/android/ui/accounts/NewAccountAbstractPageFragment.java
	src/org/wordpress/android/ui/accounts/WelcomeFragmentSignIn.java
use PostsActivity instead of WelcomeActivity as the entry point