fix branch name usage from environment

fix typo: remove whitespace from metadata key GIT_BRANCH (#9)

Co-authored-by: Laura Ojala <laojala+github@gmail.com>

fix: allow to use without metadata/variables

v0.2.2

get metadata only from first place

use short robot name as acid

v0.2.1

use short name instead of long (#6)

use metadata instead

use metadata instead of variables

v0.1.1

small fixes

Initial release

fix setup.py classifier (#3)

* add badges
* remove invalid classifier