Supports setting relative frames when a previous element does not exist

below_prev & above_prev should set set their frames relative to y=0 and right_of_prev & left_of_prev should use x=0 as their starting point when no previous element exists.
Merge pull request #155 from infinitered/bp_without_p

Supports setting relative frames when a previous element does not exist
Changed current_view_controller to accommodate ProMotion-menu
Test for that last commit
Updated table template to make it simpler, no need for extra stylesheet for the view, it just makes it overly complicated
Fixed grid spec failures in RM 3.0/64bit. Bumped version for next gem
Fixed problem where rmq inside a stylesheet couldn't select views from the root_view. This bug sucked
Adds ability to pass hex color params directly
Properly handle clean colors
Adds ability to pass RGBA color params directly
Adds ability to pass HSVA color params directly
Adds checks for proper parameters and refactoring
Updates stylesheet color reference; sample app
Adds color.with(options) method

  Options allow all rgba values
x % 16 shouldn't use 256, + tests
Final refactoring; removes color pollution; adds from_base
Merge pull request #157 from squidpunch/expand-color

Allows color creation by passing in parameters
Added short version and bumped version to 1.0.0