Teensy 2 pin definitions

Add pin definitions for Sparkfun shield on Teensy 2
Merge branch 'master' of git://github.com/twasiluk/Sparkfun-MP3-Player-Shield-Arduino-Library into twasiluk-master
Added void setVolume(uint8_t);
  sets both left and right volume.
used __BIOFEEDBACK_MEGA__ defined in custom custom board's pins_arduino.h, for pins not normally defined in stock Arduino.
Cleared interrupt during refill, if used. As to allow others.
  Such as timer0 was falling behind during the SdCard track.read().
Along with displaying current second at command prompt, for verifying time.
improved SPI handling to guard against other SPI effects and speed
increased SPI rate for 16Mg vs 8Mg FCPU, as to read at correct speeds.
implemented sdfatlib20130629 into repo
minor corrects of SdFatUtil's FreeRam() reporting correct value.
added PERF_MON_PIN to enable allowing measurement of the CPU utilization and description of performance document
added SendSingleMIDInote() that sends a MIDI beep.
It will suspend current playing stream to send beep and then resume prior stream
added support for BareTouch pinout in config
updated documentation for BARETOUCH
added demo of button using button2.h library for debounce
updated version in Doxyfile
added actual MP3ButtonPlayer2.ino
Fixed uninitialized Serial and sd. Works now!
updated patches and plugins
implemented sdfatlib20130313 into repo
updated VLSI Patches and Plugins.
fixed MP3ButtonPlayer2.ino example
Added support for Bass Enhancer VSBE
functions for get and set of Treble/Bass/FreqLimit/Amplitude
sci_bass_m union struct to handle nibbles vs word.
updated documentation
corrected history.md