Show commands rather than file set

Adds showQuickRepoHistory command to CodeLens
Adds showQuickCommitDetails command to the status bar
Adds showQuickRepoHistory command to the status bar
Changes recent CodeLens default command to showQuickCommitDetails
Changes status bar default command to showQuickCommitDetails

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

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

Fixes #10 vscode/#11485 makes gitlens unusable with whitespace rendering
Fixes #11 Not showing details of commits
Fixes #12 command 'gitlens.XXX' not found
Fixes #13 Handle exception when you open a file that does not exist in a git repository
Fixes #14 Remove logs from production build

Removes duplicate lint rule
Switches on-demand CodeLens to be a global toggle

Rewrites blame annotation controller and provider - fixes whitespace issues, reduces overhead, and provides better performance
Rewrites status bar blame support - reduces overhead and provides better performance
Adds showFileHistory command to status bar
Renames showHistory to showFileHistory
Fixes log to use iso 8601 for dates

Adds showHistory command support to CodeLens
Fixes and improve the showHistory explorer
Refactoring

Adds output channel logging, controlled by the `gitlens.advanced.output.level` setting
Removes all debug logging, unless the `gitlens.advanced.output.debug` settings it on