Update .gitignore - exclude entire /.idea directory
Update .gitignore - exclude entire /.idea directory

* Git is currently wants to check in changes to  /gradle.xml.  The entire /.idea directory should really be ignored.

jaydeetay/stardroid,jaydeetay/stardroid,jaydeetay/stardroid,sky-map-team/stardroid,sky-map-team/stardroid,sky-map-team/stardroid,heychirag/stardroid,heychirag/stardroid,sky-map-team/stardroid,sky-map-team/stardroid,heychirag/stardroid