* Added thumbnail loader
* Deleted old shell icon extraction logic.
Refactored ImageLoader.Load to improve readibility.
* Moved error handling down into the API call itself
* Minor renamings in ImageLoader
* Load icons only for files that are not images. Fixes stutters when loading folders.
* Added the ability to load a full image through ImageLoader.
ImageLoader.Load now also has a "loadFullImage" parameter.
* Max image cache is now 5000 instead of 200.
* Added some commentaries on how thumbnails are loaded
1. installer
2. auto check update on startup
3. auto start on next startup
4. remove command line arguments which breaks squirrel
5. auto generate installer on continue integration
1. Fix can't find Result.ctor bug for plugin introduced in
c0889de1f9ae460b2cc189eb59e5bd90ddb7d17e
2. use %APPDATA% for all data, part of #389
3. MISC