wip - base component height

1. Unity class naming (all caps)
--> Rename $control => $BOX
2. Remove all abstract class to share/class/
3. Remove `max-height` constraint for $BOX
4. Remove repeat style in instance (e.g. border-style, border-width)
wip - Unity form controls

1. Remove repeat styles in $CONTROL instance.
2. $BOX is super class of $CONTROL and $CONTROL remove outer border,
since add border-width as form controls padding in order to get same
height with other form controls(textfield, button)
wip
Unity component height

New variables:

1. $textfield-min-height - Effect the content height of component.
2. $component-inner-height - The larger one between $py-line-computed and
$textfield-min-height.
3. $component-outer-height - Component content height with outer padding gaps
and border width.

Feature adjusted:

1. Remove .indent-left-* and .indent-right-*, only and set default indent width
as 20%(a column width in elastic-grid.css)
2. Extend default modifiers(e.g. .mini, .naked) in labels, .icon, .message,
headline and .breadcrumb.
3. Unity component height for every base component.Major of them got extended
.mini modifier.
wip Update details
wip - Add component .pointer-* and .tip
Add progress
Unity normal height, mini height, extra mini

1. Simplify modifier name on .progress.
2. Unity extra mini component height.
Fixed incorrect height of .message and .link

1. Make up lost top border as top padding.
2. Adjust smaller size for .message-icon.
3. Fixed .link not inherit line-height.
Fixed bug highlight cover by button

1. Add new Class $GROUP & $GROUP-ITEM.
2. Add new item Class $ITEM-*-LOOSE/TIGHT.
3. Unity Class names in ALL-CAPS.
4. Update collection style by new stuff.
WIP
Add layout/ dir
Add skeleton demo with home page

Skeleton:

content
|
--- header
|
--- main
|
--- footer
Add login pages with diffent brand labels
Fixed $GROUP-ITEM uncompliate with UI

1. Add disabled state for $GROUP-ITEM.
2. Remove left hightlight of .nav and .pagination.
3. Add $GROUP-ITEM-* control the border color of $GROUP-ITEM.
Unity component height.