adds Content-Type header to rps server response with mime type based on file extension
Merge branch 'develop' of github.com:BitShares/bitshares_toolkit into develop
Add descriptions to a bunch of async tasks

Conflicts:
	libraries/fc
Auditing async/scheduled tasks, part 3.  Make NTP startup/shutdown thread-safe.  Shut down log rotation before exiting to avoid crashes.
Reorganize wallet_get_info
API cleanup
Merge branch 'develop' of github.com:BitShares/bitshares_toolkit into develop
Update fc submodule