Code formatting
- Only use one var when possible
- Define one var on each line (child1N)
- Avoid comments on 2 lines for a few chars
- Remove unecessary empty lines
Remove extra spaces
Fix jshint var is already defined
Untabify demo.js

No code change. Only replace tabulations. Thx Notepad2
demo.js code formatting

Ability to put breakpoints into setTimeout functions
Fix jshint warnings in demo.js
Refactor drawDebugInfo
Fix .cost vs .getCost()
Code formatting (benchmark.js)
update test harness and jshint checking on top of #27
Update doc for astar.search
basic reorganization and whitespace