remove some unneeded list calls
Merge branch 'develop' of https://github.com/clld/clld into develop
Merge branch 'release/0.19.2' into develop
prevent nose deprecation warning
refactored head/body iteration
added option to choose default base layer
restrict dicts to known keys
split common.py up into individual submodules
Merge branch 'develop' of github.com:clld/clld into develop
refactored to not interfere with test coverage
fleshed out llod support
document the new map option
bumbed version number
Merge branch 'release/0.20'