Issues/36 reblogging improvements

Improves the reblogging experience in the Reader by removing the old slide up form and replacing it with a view controller. 

Fixes #36 
Fixes #1380 
Fixes #1486 

~~If you change orientation on the iphone you will notice the view might not correctly resize, and you won't be able to tap to add your note.  This is the same issue as in #1043 and will be resolved there.~~
Turns out it was a separate issue and is now resolved.