update block syntax, closes #20
Merge pull request #21 from jenius/block-update

update block syntax, closes #20
scope global variables under 'rupture'
base font size fix for @declandewet
Add anti-overlap feature

Based on PR #14 by Coobaha. Changed examples and tests to use kwargs,
cleaned up the documentation, and slightly refactored the `between` mixin.
Merge pull request #18 from jenius/scoped-globals

Scope global variables under 'rupture'
0.2.0
Refactor anti-overlap feature and merge in scoped variables

Changes:
- Merges with the scoped variables changes.
- `rupture.anti-overlap` variable now accepts booleans or single values, and can covert
  between pixel and em values based on rupture.base-font-size.
- `enable-anti-overlap` variable removed.
- `force-anti-overlap` argument renamed to `anti-overlap`, and now accepts the same
  values as `rupture.anti-overlap`.
- Fixes a bug / typo in the anti-overlap test.
- Update readme.
Merge pull request #22 from sbking/anti-overlap

Add anti-overlap feature w/ kwarg examples
Add retina kwarg to width mixins

Also adds `rupture.retina-queries` variable to let user define retina condition strings.
Refactor `retina` kwarg into `density` kwarg and add `density` mixin/settings
Merge pull request #25 from sbking/density-kwarg

Density kwarg
Add `landscape` and `portrait` mixins and `orientation` kwarg
Merge pull request #24 from sbking/orientation-kwarg

Orientation kwarg
added support for named scale items
Merge pull request #26 from jenius/named-scales

added support for named scale items
0.3.0
Fix +at(slice-name)

Fix the related bug when using +at() mixin with the slice's name instead
of its measure
Fix +at() with last slice-name

Fix previously inserted bug wen using mixin +at('xl')
Rename function -get-index to -get-scale-number

The function -get-index() has been renamed to -get-scale-number(), as it
actually returns the scale number from its name, and not a zero-based
index.