Update React and gulp-react

## Problem

wGulp will fail to transpile JSX that uses any of the new JSX syntax featured in React 0.12

## Solution

Update react and gulp-react dependency versions

## Also in this PR

Change jshint rule to not require a `new` keyword before a capitalized function. Usually these capitalized variable names refer to classes that need to be instantiated with `new`. However, we have been using this syntax with React components and those should not use `new` - so we should disable this rule. 

## How to +10

I am unsure how backwards-compatible this change is. We should do some spot-checks on projects that are currently using React + wGulp and ensure there are no runtime errors when transpiled with this branch.


@trentgrover-wf 
@evanweible-wf