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

Nested .gitignore files can cause blame to fail with a repo within another repo

Adds shortcut for gitlens.showQuickRepoHistory
Adds gitlens.advanced.maxQuickHistory to limit the number of quick history entries to show
Adds gitlens.diffLineWithPrevious as alt context menu item for gitlens.diffWithPrevious
Adds gitlens.diffLineWithWorking as alt context menu item for gitlens.diffWithWorking
Adds gitlens.showFileHistory as alt context menu item for gitlens.showQuickFileHistory
Removes context menu for gitlens.diffLineWithPrevious
Removes context menu for gitlens.diffLineWithWorking
Replaces gitlens.menus.fileDiff.enabled & gitlens.menus.lineDiff.enabled with gitlens.menus.diff.enabled

Removes `Git` from the commands as it feels unnecessary
Reorders the context menu commands
Adds `Diff Commit with Working Tree` to the explorer context menu (assuming `gitlens.menus.fileDiff.enabled` is `true`)
Adds `Diff Commit with Working Tree` & `Diff Commit with Previous` to the editor title context menu (assuming `gitlens.menus.fileDiff.enabled` is `true`)

Allows for deep navigation through git history

Fixes typo and utilizes new range method

Adds compare options to file history
Fixes issue with repository history compare with commits with multiple files

It falls back to the folder repository

Adds new gitlens.showQuickRepoHistory command
Adds gitlens.showQuickFileHistory option to the settings
Removes git.viewFileHistory option
Changes the gitlens.statusBar.command settings default to gitlens.showQuickFileHistory