Consolidated lots of duplicate functionality
go back navigation should be robust now

Adds file history choices to commit quickpick
Adds repo history choice to file history quickpick
Adds commit message to quickpick placeholder in a few places

Moves show all quickpick item to be first

Tried to find the most recent filename given a commit, but git doesn't seem to want to cooperate

Wouldn't always grab the correct commit

Fixes #24

Adds blame toggle to the editor toolbar

Rearranges menu structure

Fixes #29 - Commit info tooltip duplicated for current line when blame is enabled
Improves performance of navigating line when active line annotations & statusbar blame are enabled

https://github.com/eamodio/vscode-gitlens/issues/26

Fixes updating active line annotations after file save

Re-adds context menu for diffLineWithWorking

Combines activeline annotation settings

Adds message setting to annotations
Adds active line annotations & setting

This is in-case it is still needed (it if off by default)

Changes from git to gitlens-git

Would occur when the filename had changed