Merge pull request #1037 from oliverds/master

Closes #1036: Category price currency
closes #1035
closes #1026 only admin can publish new
closes #1026 only admin can publish new
email newsletter send HTML
Merge pull request #1039 from oliverds/master

Bootstrap and other libraries upgrades
migration mysqli
Merge branch 'master' of github.com:open-classifieds/openclassifieds2
Merge branch 'master' of github.com:open-classifieds/openclassifieds2