Release 3.0.0

• see git history for complete list of changes
• new sendMessage() function that does not use std::vector
• various std::string updates, including use of UTF8 for port names
• fixes for the MIDI queue
• various build system updates and code efficiencies

A distribution of the release with the configure script and documentation already generated is available at:

• http://www.music.mcgill.ca/~gary/rtmidi/release/rtmidi-3.0.0.tar.gz