Added default values for all INTEGER columns that were missing them
Merge pull request #1816 from wordpress-mobile/issue/1812-reader-cursor-illegal-state-3.1.1

issue/1812-reader-cursor-illegal-state-3.1.1
Merge branch 'hotfix/3.1.1' into release/3.2

Conflicts:
	WordPress/src/main/java/org/wordpress/android/datasets/ReaderDatabase.java