Smart Delete Plugin Added

Simple plugin inspired by ReSharper plugin for Visual Studio that increadibly speed up work with structured texts.

No special keys, just <kbd>del</kbd> and <kbd>backspace</kbd>

![sublime-smart-delete](https://f.cloud.github.com/assets/88868/584611/dbe1b606-c91e-11e2-820f-823c73de9fa9.gif)