Remove old versions from dist

They bloat the code base and can be obtained from Releases when needed.
Add Gruntfile and package definition
New distribution files built with grunt
Rename JS files in examples
Remove makefile and old build assets
Minor readme cleanup
Reformat README into markdown.

Also add Grunt usage instructions.
Update uglify version as package will build only with v0.3.0 and higher
Merge pull request #26 from Edicy/grunt

Grunt build process