change default ClosureCompiler to jsmin

[Ryein Goddard]

Need to change ClosureCompiler as the default to jsmin or just remove ClosureCompiler.js as it isn't supported? Unless the main author gave the project to some one else it appears to be archived.

[Slawomir Jasinski]

Doesnt look like it was archived ? https://github.com/google/closure-compiler up and running