return rowid on insert

[zoff99]

is there a method that just returns the "rowid" after insert?

[gfx]

Inserter#execute() (or ones that use it) returns the last inserted row id.

https://github.com/gfx/Android-Orma/blob/master/library/src/main/java/com/github/gfx/android/orma/Inserter.java#L68