first version of blockly directive
Add first blockly example
add run and show code buttons -- prototype
add youtube and vimeo directives
add static media for blockly AND categories of blocks
add custom print function
notes on how to incorporate some initial code, or load saved
add preload:: section to blockly directive to have some blocks in place
todos
Move blockly files to common/ext/blockly
Figure out the right relative path to blockly home
put blockly stuff inside an iFrame so we can have multiple blocklys per page
Fix some formatting
more work on formatting.
Merge branch 'refs/heads/blockly'

Conflicts:
	modules/luther/sphinx/video/video.py
remote second blockly example and add suggested actions to try the blockly block.