cleaned up script tags
Worked through many issues blocking a jQuery upgrade.
jquery refactor of deprecated hover event, proper use of attr vs prop
Closes #226 - restrict variable names properly
Closes #227  fixed dragging a codeblock to create a codeblock command
Closes #225 - jQuery deprecated functions refactored, upgraded to current version.
updated README
updated README
updated README, added documentation link
updated README, issues note
updated README, docs note