fixing bug in calculation of revision text hash
Update README.md

Include reference to required library lxml (v3.3.1-0 or later).
Merge branch 'v1'

Conflicts:
	wikidat/sources/pages_meta_history.py

Moving regexps to identify FA, GAs and track supported file
dump extensions to module utils/maps.py.
Merge branch 'v1'

Conflicts:
	wikidat/sources/pages_meta_history.py

Moving regexps to identify FA, GAs and track supported file
dump extensions to module utils/maps.py.
deleting forgotten tag from merge
Merge branch 'v1'

Importing new version of multiprocessing parser for Wikipedia dump files
minor syntax fixes
Queries for data preparation and basic metrics
Fixed module name for parsing workflows