Improve Android .gitignore comments

Update Cloud9.gitignore

fixed handling of nuget packages

Ignore sensitive data

Ignore grunt and lcov build files in Node projects

Add output directory of sbteclipse plugin, which is ".target" directory.

Add "dist" and ".cache" folders for Play 2.2.x

Added SCons.gitignore

Update to Magento 1.8.x

added node_modules

Added the new upload directories and ignore the cache directory completely

The next version of Cloud9 will use a top-level .c9 folder in the workspace for settings and metadata.

which is ".target" directory.

Link: http://www.playframework.com/documentation/2.2.x/Anatomy

Rails: Ignore config/secrets.yml

Remove duplicate rule

Update Delphi to include new extensions

I wrote a more explanatory comment regarding the cache directory
and why it is ignored.

Added file for Common Lisp.

Added ipa file to Objective-C.gitignore

Update Java to exclude J2ME Mobile Tools for Java

Use absolute paths to the files to ignore

This fixes an issue where index.php within a theme directory would be ignored, when the intention was to just ignore the index.php file in the root.

C: Ignore Some Common File Extensions for Binaries on Linux

Remove duplicate line in Objective-C.gitignore

plugin.xml shouldn't be in source control.  This is a Grails plugin artifact