Fixing possible errors from connection issues

Much lazyness means very little error checking,
e.g. loading an entry without network gave you
an exception. Not anymore, but the result isn't
really pretty. That should be fixed before this
is really something usable
Error recovery proposed solution
orphan commit: error proposal
loading entry errors step 1
Changed showerror method sig.
Handling image upload errors
Finding error locations, calling function that shows errors
possible todos include "retry" function
Errors as string
some cleaning in postentry/postimage
more errormsgs
more error groundwork
blipcomments error detection

Finding errors and calling showErrors.
Error catching addcomment

Show an error if needed on the add-comment fragment
Merge pull request #1 from NanneHuiges/connection_errors

Connection errors