RLS,DOC,CLN: setup.py description, classifiers, README.rst, HISTORY.rst, .gitignore
Merge branch 'release/0.2.1'

* release/0.2.1:
  RLS,DOC,CLN: setup.py description, classifiers, README.rst, HISTORY.rst, .gitignore
Merge tag 'v0.2.1' into develop

RLS: promiumbookmarks v0.2.1

* tag 'v0.2.1':
  RLS,DOC,CLN: setup.py description, classifiers, README.rst, HISTORY.rst, .gitignore