Add more paths to the .gitignore file for some IDEs and Composer.

See #6017

git-svn-id: https://buddypress.svn.wordpress.org/trunk@9144 cdf35c40-ae34-48e0-9cc9-0c9da1808c22
Add more paths to svn:ignore for some IDEs and Composer.

Fixes #6017, props slaFFik


git-svn-id: https://buddypress.svn.wordpress.org/trunk@9145 cdf35c40-ae34-48e0-9cc9-0c9da1808c22