Fixed Language Lesson locale issue.
Added in Lesson locale language validity check.
Merge remote-tracking branch 'micah/LessonsLanguageIssue'

Conflicts:
	app/src/info/guardianproject/mrapp/EditorBaseActivity.java
	app/src/info/guardianproject/mrapp/HomeActivity.java
	app/src/info/guardianproject/mrapp/StoryTemplateChooserActivity.java