Removed obsolete code from FCGI code
Some protocol updates (settings)
Implemented MSGSV/MSGGT commands.
Some better error responses.
Added redis information.
User cache may be disabled for clustered operation.
Disabled sending messages B2B if in non-clustered mode.
Disabled B2B receiver in non-clustered mode.
Renamed file, fixed bug confusing clustered/non-clustered mode
Some indentation & renaming
Updated nginx configuration
Microseconds added to debug statements

This allows for an easy performance evaluation.
Transition to normal mutex.

...for performance reasons. May be better at all.
A little bit of linting; accepting (2,0,1) as well.

Code 201 indicates that the message has been delivered, in opposite to
code 202, indicating that the message has been queued.
Removed unneeded boost libraries (system, threads)
Fixed severe bug (segfault) in B2B communication.

A string was destroyed (by unordered_map::erase) before it was
used in the Communicator::send function.
More detail in error message.
README update

No more boost-threads and boost-system libraries.
Changed possibly inefficient vector handling code in IPC
Immediately returning an error if broker is down.

Previously, the request would never return.