doc (README): add badges

bugfix (indexedDB): flushing a non existing db would throw a critical…

… error ... mickael-kerjean#97

improvement (orgmode): org mode checkbox - better design

release (v0.2): prepare 0.2 release

Release (v0.1)

improvement (dragdrop): Improve UI while doing a folder upload - mick…

…ael-kerjean#14