fine tuning

• use cli option group for lockable (#6)
• improve documentation (#7)

requirements parser fix and optimise allocation

Fix: Parse requirements a=true&b=False properly as boolean values.
Optimization: if no any suitable resources found raise immediately.

resources.json validation

Patch release validates resources.json and improve documentation

autouse lockable_resource

Changes:

• autouse: release resource as soon as it's not needed anymore.
• improve test coverage
• store resource dictionary to testsuite property

Initial version of pytest-lockable

v0.1.0

add mention about conftest.py