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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if I do `var discounts = this.state.discounts` first then it changes nothing because it doesn't do a deep copy. The only not to do that is to do a deep copy of the variable before modifying it and then setting it back into the state which would have pretty much the same side effect.