use java 1.6 to compile project and create zip file

by default maven use 1.3 java -> Maven : error: generics are not supported in -source 1.3
Merge pull request #464 from couchbase/origin/feature/issue_458_2

use java 1.6 to compile project and create zip file
Reproduces issue #208

Checked in as failing, since test currently fails.

https://github.com/couchbase/couchbase-lite-java-core/issues/208
Minor tweaks to unit test

https://github.com/couchbase/couchbase-lite-java-core/issues/208
Update submodule
Update README.md
Merge branch 'master' of https://github.com/couchbase/couchbase-lite-android into feature/cbforest

Conflicts:
	libraries/couchbase-lite-java-core