Context aware keywords

On main page, keywords will contain all categories from all posts.
On post page, keywords will contain all categories from the post
currently being viewed.
Merge pull request #86 from alfhenrik/context-aware-keywords

Context aware keywords for page metadata
updated Costura and excluded debug symbols
set project to debug so barbato has debug files
Merge pull request #87 from phillip-haydon/ServerFeature

Updated Costura to latest version for completely merged .exe!