Some naming tweaks
Add reverse index, substring, contains
Levenshtein distance
Merge branch 'master' into strings
String comparison functions
(Note: These are case-sensitive, which could confuse people?)
shortcuts added
Update undo.js

For mac user, event for pressing cmd key is added

'cmd + z' for copy
'cmd + x' for undo
Merge pull request #507 from usetheimpe/shortcuts

shortcuts added
get examples running again
Merge pull request #513 from waterbearlang/512_examples_not_running

get examples running again
add more examples to the menu
Rudimentary regex support
Some new math blocks
Name/description tweaks
Add gcd and lcm blocks
Add factorial/gamma
Add min and max
Rebuild
shortcuts added
Update undo.js

For mac user, event for pressing cmd key is added

'cmd + z' for copy
'cmd + x' for undo