Remove trailing whitespace
Remove "Successfully created proposal" flash

This is visually disturbing, and since it looks similar
to the "Successfully applied proposal" message we had a customer
confused by it already. Just remove it.
Add support for Windows Server 2012 R2
Merge pull request #1105 from vuntz/win2012r2

Add support for Windows Server 2012 R2
Merge pull request #1124 from dirkmueller/no_successs

No successs
Initial support for provisioning SLE12 nodes
Correctly sort the list of available platforms

Here's how we sort it:
  - first the default platform (since it's the default)
  - then linux platforms, alphabetically sorted (and with higher
    versions first)
  - then Windows, with higher versions first
  - finally Hyper-V, with higher versions first
Merge pull request #1128 from rhafer/vuntz-sle12

Initial support for provisioning SLE12 nodes
add .sass-cache dir to gitignore

A lot of files are generated in crowbar_framework/.sass-cache when
running the tests locally. These can be ignored.
Merge pull request #1130 from mapleoin/sass-cache-ignore

add .sass-cache dir to gitignore