Styling and markup updates to the Admin Bar: this commit involves massive
changes to the Admin Bar

1) Removed WP Admin Bar default styles, for two reasons

 a) The current default css uses a an all selector ('*') to apply a number
of default styles that completely inhibit the ability to inject Bootstrap into the admin, and make custom responsive styling an immense challenge
 b) Because this admin bar is now highly customized, we do not want future releases of WP to upset those customizations without proper vetting

2) Moved the default styles to a customizable stylesheet
'admin-bar-custom', now found in the mu-plugins folder

3) The openlab-toolbar.css file has been completely rewritten using less;
the number of lines was also reduced by eliminating lines in
admin-bar-custom.css that were causing styling headaches

4) The comments, new, and edit menus were all moved to custom functions
inside of the OpenLab_Admin_Bar class, for better styling control

5) The main menu was hidden, per the design (duplicates functionalty)

6) Bootstrap markup has been injected and applied the admin bar at large
Spacing commit