use rcfeed for main feed loading
merged with master
merged master2 branch (working on RCFeed) with master
some changes to the way pins are selected
merged with current master
implemented load more for rcfeed
fixed selecting post
switch loading code in main feed to model layer
some clean up
fixed missing annotation problem
fixed bugs related to tapping post not in the original load
merged master2 with in memory feed with master
added logging message and fixed subject, content problem