v0.2.0

• added detailed merge information for joins (#25)
• added supoort for tidyr functions: gather, spread (thanks @WilDoane), drop_na (@jackhannah95), fill and replace_na
• use clisymbols for ellipsis
• add number of remaining rows to filter (#23)
• bugfix: do not report negative NA (#18)
• bugfix: avoid partial matching (closes #26)