Merging v3.5 into master branch for latest release

Merging v3.5 into master branch. Latest release includes several enhancements to the core code base and a general re-architecture of file structure.

**Release list:**
- smaller footprint of compiled CSS files (~25KB minified and gzipped) with more compression coming.
- grid update to column based format
- grid nesting is now automatic without `alpha` and `omega`
- REMs utilized in grid, typography, and a few other places (fallback for pixels)
- class format cleanup to utilize less classes and more extendability
- better color configurations
- simplified structure for buttons, tables, captions, callouts, and other components
- organized navigation elements (page nav, pagination, responsive, etc)
- Sass builds directly without Compass support (mixins built for Centurion)
- Sass core is broken down by usage. (expect more breakdown and simplification in 3.6)
- Elusive Font removed to clean-up core