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