Added documentation for functions from previous pull requests
Fix linefolding
Merge pull request #162 from ulikoehler/docfix

Add new functions to zframe.txt and zmsg.txt
Moved sendmem functions to zsocket
Fix sendmem docsg
Make socket first argument in zsocket_sendmem functions
Merge pull request #163 from ulikoehler/zsocket_sendmem

Move zframe_sendmem to zsocket
First version of zcurve, with fixed length messages
Cosmetic style fixes