first version of the system rake task
* detection of rbenv or rvm is missing
* refactoring is needed
small refactoring
Merge branch 'develop' into feature/system-info-rake-task

* develop:
  refactored footer
  extend footer links to include user guide
  add status badges to readme
  bugfix: regression test failed because slider partial was changed
  add sitemap component
  fixes #76
  pull request feedback
  bugfix: slider used headline attribute on link instead of title

Conflicts:
	CHANGELOG.md
updated the info rake task
* added rbenv and rvm version
* write the output to the tmp directory
changed the namespace of the system info rake task to infopark:info
resolved merge conflict
pull request review

+ added renamed rake tasks to the changelog
+ dry'd up the system task logic

fixes #70
Merge branch 'feature/system-info-rake-task' into develop

* feature/system-info-rake-task:
  pull request review
  changed the namespace of the system info rake task to infopark:info
  updated the info rake task * added rbenv and rvm version * write the output to the tmp directory
  small refactoring
  first version of the system rake task * detection of rbenv or rvm is missing * refactoring is needed