Added post content and thumbnail presenter
Moved public data to public_html/

This is going to improve caching.
Added posts listing (closed #7)
(WIP) Added spinner (#39)
Fixed lazy loaders injection

AbstractSearchService::getByFilter() wasn't injecting lazy loaders,
because it didn't call AbstractDao::afterLoad(). This resulted in tags
not showing up in post list, because there was nothing to retrieve them.
Changed lazy loaders injection so that it's always executed as soon as
possible (i.e. right in EntityConverter).
Fixed transaction manager tests using real DB
Fixed messages in post upload presenter
Changed font for tags in tag input to sans-serif
Fixed border for focused tag input