Man pages rebuilt automatically
Second draft of zcurve module
- sending/receiving frames over DEALER-ROUTER, in selftest
- new module, zblob, for size-specified binary strings
zcurve works with variable messages
- beginning to support metadata
- removed zblob class again, it's not needed
Added -lpthread to link statement
Fixed lots of small faults in recently added code
- variable names like 'i' and 'strSomethingBogus'
- memory leaks in selftests
- general indentation and layout
Removed latest zero_copy additions in zframe and zsocket
- the code was complex and I'm skeptical that it is necessary
- it was leaking memory in selftests and I did not find the cause
- if we do *need* zerocopy all over the place I'd like to find a better API
Refactoring internals to use shared encrypt/decrypt functions
Refactored into cleaner encrypt/decrypt calls
Uses state to know when ready for messages
Minor code cleanups
Revert "Removed latest zero_copy additions in zframe and zsocket"

This reverts commit 989f5f8ce90b26e24d321ba8431917d2001c95ee.
Added zcurve_decode for message decoding