Some files and folders exclusions

- Added Sublime and CodeKit configuration files to file_exclude_patterns (there's no need to have them on the project files).
- Added .svn and .hg to folder_exclude_patterns (we might be using other version control instead of Git).
- Added folders PSD, AI, AI-PSD, PSD-AI to folder_exclude_patterns (that's how I usually name my folders with the original art files and they have not use in Sublime).
- Added .psd, .ai, .tif, and .tiff files to file_exclude_patterns (useless on Sublime, in case they're not on the usual folders omitted above).