Fix #40

Set `mTransient = true;` on `Entity.delete();`
Merge pull request #41 from ChristopheCVB/patch-1

Fix #40
Updated target to SDK-20 (Android 4.4W).
[Gradle] Updated to SDK verison 20 and used new plugin name.

Signed-off-by: Juri Berlanda <juriberlanda@hotmail.com>
[Gradle] Addded build directory to .gitignore.

Signed-off-by: Juri Berlanda <juriberlanda@hotmail.com>
[Gradle] Fix builderrors on lint errors.

Signed-off-by: Juri Berlanda <juriberlanda@hotmail.com>
[Gradle] Fixed last lint error. Removed "abortOnError false".

Signed-off-by: Juri Berlanda <juriberlanda@hotmail.com>