More objects and base header & footer HTML structure

Added _nav to objects
global header and footer includes
New Print stylesheet starter from Rock Hammer
Removed `!default` from variables may add later. Inclusion of `_color.scss` and variable to match. Also work on `_brand.scss` to match new color variables.
Move `_print` to `base` folder. Added global `color.scss` and `texture`. Merge of several styles from Rock Hammer into `images` and `shared`.
Merged more Rock Hammer image styles
New `_linear-gradient` mixin from Rock Hammer. Updated `_textures.scss` to exclude RH specific variables of Bootstrap components
Inclusion of `_media` object from inuit. Changed color variables.
This version may be a good starting point to branch off into design for a while.
Moved `_color` and `_texture` to `base` folder
Merge branch 'Develop'