More improvements in SQL params in queries
Merge branch 'mediawiki' of https://github.com/VizGrimoire/VizGrimoireR into mediawiki
Merge branch 'mediawiki' of https://github.com/VizGrimoire/VizGrimoireR into mediawiki

Conflicts:
	misc/datasource2identities.py
SCR: Added NEW, MERGED, ABANDONED and PENDING metrics using changes table from bicho
SCR: Complete periods in pending data frame