Merge branch 'feature/118'

Close #118
Clean up sidebar in manual - 120
ZF-Logo to Readme added
Merge pull request #121 from froschdesign/feature/manual-sidebar

Clean up sidebar in manual - 120
Merge branch 'hotfix/121'

Close #121
Merge branch 'hotfix/121' into develop

Forward port #121
Merge pull request #122 from froschdesign/feature/logo-in-readme

ZF-Logo to Readme added
Merge branch 'hotfix/122'

Close #122
Merge branch 'hotfix/122' into develop

Forward port #122
Fix for 119 - CSS styling for box "Important" is missing
Zend Framework 2 Advanced Course promo
Merge branch 'hotfix/training-promo'
Merge branch 'hotfix/training-promo' into develop
Re-instated ZF2 advanced course banner
Merge branch 'hotfix/zf2a-course-promotion'
Merge branch 'hotfix/zf2a-course-promotion' into develop
Added Centroy logo to homepage
Merge branch 'hotfix/new-featured-company'
Merge branch 'hotfix/new-featured-company' into develop
Merge pull request #123 from froschdesign/hotfix/119

Fix for #119 - CSS styling for box "Important" is missing

Conflicts:
	public/css/app.min.css