file blame

Added

• blame a file [@cruessler] (#484)
• support commit.template [@wandernauta] (#546)

Fixed

• debug print when adding a file to ignore
• fix scrolling long messages in commit details view (#663)
• limit log messages in log tab (#652)
• fetch crashed when no upstream of branch is set (#637)
• enter key panics in empty remote branch list (#643)

Internal

• cleanup some stringly typed code [@wandernauta] (#655)
• introduce EventState enum (removing bool for even propagation) [@tisorlawan] (#665)