Revert to 3.8.1 version of Android Maven plugin

A quick fix for #106, while you work on tests in #111
highlighted cells not refreshing fix

refreshDrawableState(); added to setHighlighted(boolean highlighted)
Merge pull request #114 from PeterBergmann/patch-1

highlighted cells not refreshing fix
Merge pull request #113 from f2prateek/patch-1

Revert to 3.8.1 version of Android Maven plugin
Prepare 1.1.1.
[maven-release-plugin] prepare release android-times-square-parent-1.1.1
[maven-release-plugin] prepare for next development iteration