style fixes
fix #1550: check for null context in ProcessAttachmentsTask.doInBackground
pass context parameter to ProcessAttachmentsTask constructor
null check for context in addMedia
use emailchecker 0.3
Merge pull request #1605 from wordpress-mobile/issue/1550-npe-ImageHelper.getImageSize

fix #1550 npe image helper.get image size
Merge pull request #1607 from wordpress-mobile/issue/1606-emailchecker-0.3

fix #1606: use emailchecker 0.3
fix #1588: check for activity destroyed before opening a post
Merge pull request #1615 from wordpress-mobile/issue/1588-ise-activity-destroyed-postsactivity

fix #1588: check for activity destroyed before opening a post
use full version qualifier for our submodules and re-add commons-lang library because it's used in GCMIntentService
Merge branch 'develop' into feature/modularization

Conflicts:
	WordPress/src/main/java/org/wordpress/android/ui/posts/EditPostContentFragment.java
	build.gradle
	src/org/wordpress/android/util/ImageHelper.java
Merge branch 'develop' into feature/modularization