Create new bill

Only ui and features, not storing to database. No backend routes done.
I can take suggestion for UI, but I will not make any kind of improvement on that matter except for real issues. 
This is focused on features : 3.2.1, 3.2.2, 3.2.3, 3.2.4 of the SRS

[Demo](http://screencast.com/t/t9LRpY7CfMAG)

#1 #3 #4 #5

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You know JS' internals better than I do so I'm not questioning that. I know it doesn't do a deep copy, it might just be a perspective thing but I thought it was better (even if just semantically) to never mutate `this.state` directly. Fair enough.