Added "preserve" block (closes #104)
Added sane branch label for constant block
Compiler now always exposes filename via buf.filename
runtime: modified info.eventHandlers to match Meteor's event map specification
runtime: Updated blade.LiveUpdate object with sane no-op functions
Live UI plugin:
	- major re-work
	- now depends on Spark standalone package (see https://github.com/meteor/meteor/wiki/Spark)
	- Removed blade.Runtime.render(...)
	- Removed Context code (this is a part of Spark)
	- Landmarks have preservation enabled by default using preserve-inputs package (see https://github.com/meteor/meteor/blob/master/packages/preserve-inputs/preserve-inputs.js)
Added some tests
Added some documentation