Stops propagation of events

This allows nested instances of pflock
Add support for x-each
Lets x-each copy dom nodes instead of using templates based on the innerhtml
Fixes: x-each: when all nodes are removed pflock could not add new ones
Updates readme
Adds support for nested x-each's
Adds missing jsdoc comments
Moves pflock to src
Refactoring: moves x-bind and x-each into plugins
Refactores plugins
Bumps version to 0.5.0
Removes x-each from init event
Merge branch 'master' into gh-pages
Adds arrays to example
Build