LB-873: User managed banner ad on top of the blog - backend
api, model
LB-873: User managed banner ad on top of the blog - backend
* some impl. methods
LB-873: User managed banner ad on top of the blog - backend
* inser/update with type
Merge branch 'liveblog-15' into lb-873-blog-media
LB-873: User managed banner ad on top of the blog - backend
* adjusted
Merge branch 'liveblog-15' into lb-873-blog-media
LB-873: User managed banner ad on top of the blog - backend
* db upgrading
Merge pull request #280 from msat-cont/lb-873-blog-media

LB-873: blog media