Added ability to delete item with item, retrieve child items from parent, update item field values.
Code refactoring.
Added default language, site, database values for ScApiSession.
Code refactoring.
Code cleanup.
Merge branch 'dev' into CRUD_From_Item
Fixed typo and added tests.
Added javadoc.
Test refactored.
Test refactored.
Added  testDefaultOptionsCleaned() test.
Merge pull request #20 from Sitecore/CRUD_From_Item

Crud from item
Merge branch 'dev' into upload_intent

Conflicts:
	sitecore-api-android/src/main/java/net/sitecore/android/sdk/api/ScApiSession.java
	sitecore-api-android/src/main/java/net/sitecore/android/sdk/api/ScApiSessionImpl.java
Merge fixed.