Add sharing plugin to 3.2.17.release.

plugins/sharing/README.txt

 Version history:
 
+3.2.15
+------
+- New build because of changes in shared code
+
 3.2.14
 ------
 - Added helper methods to hide / show the dock when autohide is enabled or not, issue #60

plugins/sharing/build.properties

 devkit-dir=../../lib/devkit
-version=3.2.14
\ No newline at end of file
+version=3.2.15-dev
\ No newline at end of file