Remove unneeded goto jumps from make.bat
Add dist command to makefile and make.bat

'make dist' will build, optimize and minify all assets. After that is done, it will copy all files from the public folder together with the optimized index.html to the dist folder.

Serves as a replacement for the former build.bat.
Fix missing goto jump in make.bat
Remove r.js as it's already included in mimosa