v1.12.0

Update to Electron v2.0.1 (#2401)

Fixed: Emoji with skin tone modifiers would show up as a square (#2399)

Fixed: A few visual problems with the contact detail screen (#2374)

Fixed: complex kernel versions were causing problems in linux - thanks @jython234 (#2407)

Dev:

• Add another Windows 7 dev setup requirement to contributing.md (#2398)
• Various defense-in-depth enhancements
• Refactor api.js into web_api, which encapsulates all web access
• Move a number of dependences from bower to npm
• Enable a large set of new tslint rules
• Use React for all emojification in the app
• Print out main process logs if electron unit tests fail
• Move all forks to @scottnonnenberg-signal account
• Remove jscs from the project
• Remove unused code and templates
• Remove broken stylesheets symlink