remove effectiveContent as public API on template

R=arv
BUG=

Review URL: https://codereview.appspot.com/8855043
add table caption element
Merge pull request #49 from jmesserly/caption

add table caption element
Remove HTMLTemplateElement.bindTree and implement template.model
pre-review
cr changes
added two howto examples

R=arv
BUG=

Review URL: https://codereview.appspot.com/8833049
Linked to new examples
remove unused method
Merge pull request #52 from jmesserly/remove_unused

remove unused isCheckBoxOrRadioButton
added more howto examples

R=arv
BUG=

Review URL: https://codereview.appspot.com/8536049
added links to remaining HowTo examples
added empty doc files
Added links to template.md and node_bind.md
initial
initial
Update README.md
Re-implement instance terminators so that insertion/remove is no longer linear.

R=arv
BUG=

Review URL: https://codereview.appspot.com/8882044
Unify sidetable
Rename side_table.js to sidetable.js