Refactored commands and blame annotations

Adds better uncommitted hover message in blame annotations

Removes Git: from all the commands
Removes unused enricher

Add new StatusBar settings -- see **Extension Settings** above for details
Renames the `gitlens.codeLens.recentChange.command` & `gitlens.codeLens.authors.command` settings options (to align with command names)
Adds new `gitlens.diffWithPrevious` option to the `gitlens.codeLens.recentChange.command` & `gitlens.codeLens.authors.command` settings
Fixes Diff with Previous when the selection is uncommited
Removes `gitlens.blame.annotation.useCodeActions` setting and behavior

Adds new command to toggle CodeLens on and off when `gitlens.codeLens.visibility` is set to `ondemand`

Replaces blame regex parsing with more robust parser (also use s--incremental instead of --porcelain)
Stops throwing on git blame errors (too many are common)
Fixes issues with Diff with Previous command
Fixes issues with blame explorer code lens -- with previous commits
Fixes issues with compact blame annotations -- skips blank lines

Adds advanced setting to enable blame cache
Fixes codelens settings to actually work

Fixes file path normalization

Adds new blame annotation styles (compact & expanded)
Cleaned up blame annotations
Fixes issue with invalid repoPath on first start

Hopefully for real this time

Caches failed blames to reduce blame calls
Only clear failed blames from cache on change/save
Add better error messages and handling

Automatically turns off blame only when required now

Removes CodeLens from fields and single-line properties to reduce visual noise

Adds diff menu commands always
Attempts to move the diff file to the correct line number
Fixes code action provider -- works again
Deletes deprecated code

Adds context menus for toggling blame
Adds context menus for opening diffs
More refactoring and many bug fixes

Provides more data (commit message, previous commit, etc)

Upgrades to TypeScript 2
Lots of refactoring and many bug fixes

Only adds blame code lens within the specified range

Provides optional additional code lens

Other fixes and refactoring

Adds commands module
Adds git commit message to blame hover decorator

And minor other positioning issues

And other git related edge cases

Decoupled from the CodeLens and less processing before it is required

Also helps move lens after other lenses