v2.1.0

• Major refactor, bug fixes and docs improvements thanks to @ecksun, @fivdi, @gfcittolin, @jacobrosenthal, @mhart, @nebrius, @pabigot, @paulkaplan, @reconbot, @rodovich, @rwaldron, @sayanee, @tigoe and everyone who reported and helped debug issues!
• Fix binary paths to confirm with modern standards
• Integration tests on CI's that support it or for the folks at home with an arduino handy
• Upgrade to nan-2.2.1 for memory leak fixes and node 6 compatibility (still not supported)
• Confirm nw.js and electron compatibility
• Make the outpout of .list consistent between platforms and docs
• Define ambiguous flow control flags and document them
• Fix support systems who provide 0 as a valid file descriptor
• Fix race conditions when opening and closing ports that led to errors while reading and writing while closing or opening the port.
• [unix] Fix a double open bug on unix that would cause opening and closing ports repetitively to error.
• [unix] Listing serialports on linux now include more ports (including bluetooth devices eg. /dev/rfcommXX) and have less bugs in the output
• [windows] Remove deprecated BuildCommDCB for windows 10 support
• [windows] Fix a memory leak on windows
• [windows] Fix a 100% cpu and possible hang bug when ports were disconnected on windows.