README: removal of bitdeli badge

Signed-off-by: Tibor Simko <tibor.simko@cern.ch>
README: pypi badge fix

Signed-off-by: Tibor Simko <tibor.simko@cern.ch>
README: new About section and minor wordsmithing

Signed-off-by: Tibor Simko <tibor.simko@cern.ch>
docs: section display fix and description update

Signed-off-by: Tibor Simko <tibor.simko@cern.ch>
setup: Flask framework addition

Signed-off-by: Tibor Simko <tibor.simko@cern.ch>
travis: sphinx-build as part of the build

Signed-off-by: Yoan Blanc <yoan.blanc@cern.ch>