updating docs
can.sub return null if value is undefined or null
adding test
Fix the bug where mustache each would fail if called with the empty list
Merge branch 'master' of github.com:bitovi/canjs into can-sub-null-values
Making null or undefined check more explicit
Merge pull request #429 from bitovi/can-sub-null-values

can.sub should return null if value is undefined or null
Merge pull request #433 from bitovi/432-mustache-each

Fix the bug where mustache each would fail if called with the empty list
documentation improvements, removing old templates
adding renderer for docs
Add missing comma to observe.js

Missing comma caused all "private" functions after `bindToChildAndBubbleToParent` to be declared in the global scope
better docs
Merge branch 'master' of github.com:bitovi/canjs