chore(config): add .editorconfig
chore(git): add .gitignore and .gitattributes
chore(npm): add package.json
chore(grunt): add Gruntfile.js and .jshintrc
chore(vendor): add ES6 Promises polyfill
chore(icon): add extension icon
feat(badge): weather icons

Added Tick weather bitmaps and a module that maps them to
openweather weather conditions. Icon module also provides
some handy functions to access those mappings:
 - get an icon for given condition and time,
 - get the n/a icon,
 - get a es6 promise of image data for given condition and time.
chore(extension): add Chrome extension manifest
refactor(badge): change color and position of badge text
feat(extension): add base functionality

Chrome extension will now fetch current weather conditions every
15 minutes and update browser action badge icon.
chore(grunt): bump version before build for dist task
chore(release): 0.1.0