- started adding documentation to the Column class in the database package
 - started adding more database functionality to the library
 - overrode the toString() method in the Column class
 - working on a CreateTableHelper class to handle table creation
 - still working on the database
 - renamed the SimpleSharedPreferences class to SharedPreferenceManager
Merge branch 'database' into development

Conflicts:
	AndroidUtils/src/main/java/com/nityankhanna/androidutils/database/Column.java
	AndroidUtils/src/main/java/com/nityankhanna/androidutils/database/ConstraintType.java
	AndroidUtils/src/main/java/com/nityankhanna/androidutils/database/DataType.java
	AndroidUtils/src/main/java/com/nityankhanna/androidutils/system/SharedPreferenceManager.java