Fixes and Rapid Weight Loss

Features

• Add android permission support. #910 by @GantMan
• Drops the runtime size of ignite to around 12 MB from 25 MB. #922 by @skellock

Fixes

• Prevent new apps from being created when they have dashes in the name. #902 by @fvonhoven
• Ensures we can run in NodeJS 4 long enough to show the prereq message. #903 by @jamonholmgren
• Fixes inability to create a new plugin. #915 by @skellock
• Prevents ignite new from running when ./node_modules/react-native exists. #918 by @skellock
• Ensures the right version of yarn & react-native are installed. #920 by @skellock

Support

• Fixes a broken badge on the readme. #904 by @Dcorkran
• Added links to README docs. #917 by @derekgreenberg
• Added docs for switching to n from nvm. #923 by @carlinisaacson
• Updates NPM badge on readme to show ignite-cli. #921 by @skellock