Updated gitignore rules

- Removed IDE-specific exclusions; users should either have those globally, or
  add them to their own project.
- Added rule for ubuntu-xenial-16.04-cloudimg-console.log, which
  vagrant+virtualbox creates as a logfile.

Author: weierophinney

.gitignore

@@ -1,13 +1,5 @@
-nbproject
-._*
-.vagrant
-.~lock.*
-.buildpath
-.DS_Store
-.idea
-.project
-.settings
 vendor/
 composer.phar
 config/development.config.php
 phpunit.xml
+ubuntu-xenial-16.04-cloudimg-console.log