Add user-specific settings to Momentics.gitignore

The .settings folder contains all of the user-specific preferences for Momentics (like it does for Eclipse, since they're the same underneath). Should be local only.
Create CodeKit.gitignore
ArchLinuxPackages: Ignore AUR metadata (.AURINFO)
Create MicrosoftOffice

Continuation of https://github.com/github/gitignore/pull/594/ and details from http://support.microsoft.com/kb/211632
Merge pull request #1273 from bbodenmiller/patch-4

Create MicrosoftOffice
Merge pull request #1259 from Kaceykaso/patch-1

Create CodeKit.gitignore
Merge pull request #1266 from parched/master

ArchLinuxPackages: Ignore AUR metadata (.AURINFO)
Merge pull request #1225 from thurask/momentics

Add user-specific settings to Momentics.gitignore