Update journal API to take into account pages and tags
Update journal API to take into account pages and tags

Adds paging support to the API through the use of a ?page= query parameter, in the same way as jBlog 2. Additionally, correctly adds tags to the returned post data.
jbrowneuk/jblog,jbrowneuk/jblog,jbrowneuk/jblog,jbrowneuk/jblog