Update middleman-core version requirement to allow 3.1 and 3.2
Shamelessly copy Cucumber test framework from middleman-syntax (thx)
Define the default styleguide block file as constant
Add TODO about rendering engines for the styleblocks
Clean-up on aisle three
Fix Cucumber tests
Add support for Middleman 3.2.0. See notes; fix #2

The extension now uses Tilt to render the styleblocks and styleguide
block itself. As a bonus, styleblocks can now contain code. No instance
variables yet, tho!
Merge branch 'support-3.2.0'
Bump Ruby requirement to 1.9.2 (not tested on 1.8.7)
Version 0.2.0