Move package source into plugin subdirectory
Define / use Npm dependencies for jade, StringScanner

This makes the package usable with plain Meteor if installed with
Meteorite 0.6.0 or newer.
Remove jade and StringScanner submodules

No longer required since these are now Npm dependencies.
Fix html_scanner compatibility for Meteor 0.6.5
Add README note for usage with pre/post Meteorite 0.6.0
Bump version to 0.2.8
Merge pull request #26 from kynan/refactor-for-meteor-0.6.5

Refactor the package to be compatible with Meteor 0.6.5