Added SublimeText Project Generator

- Added generator to create project files for SublimeText
- Adds import folders to the project for navigating etc.
-  Generated project inlcudes build systems to invoke DUB build test or run from inside SublimeText

Usage
dub generate sublimetext
I put in arch because dub defaults to x86 on Windows. buildPlatform.architecture seems to always be populated but can change it to check if that is preferred.