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Move feature detection into ctor
Check for worker environment
Quotes consistency
Use external JSHint config file

Leaving globals in there as some IDEs might not work w/ jshint and it's
config file, and their static analysis might choke on unkown globals.
Prevent reference error from being thrown in worker context
Don't rely on console anymore
Remove duplication
Add worker example
Typo
Add put/removeBatch methods
Add notes to changelog
Add notes to changelog
New build
Merge branch develop, fixes #30
Add new methods to readme
Bump version number
Merge branch 'master' into gh-pages
Add analytics
Update API docs