context menu for codemap

call back function (30%, 50%, 70%, 100%) added to the new context menu for code map.
The implementation of the call back function might be improved if I found a way of providing different argument for the same function for call back function in cmenu because the functions are different from each other by one line
Update block.js

need to improve function 'addBlocksCodeMap' for blocks loaded from example
Update workspace.js

implemented clear function for codemap
added codemap structure
style updated for codemap
Update drag.js
code_map,js added
context menu bug fixed, codemap.js added to bin/build
Update build
Update build.js
Merge pull request #718 from waterbearlang/codemap

Codemap