Update revisions.txt

Author: Federico Fissore

build/shared/revisions.txt

@@ -7,6 +7,8 @@ ARDUINO 1.6.7
 * Added support to file:// protocol for boards manager URLs
 * Portable sketchbook folder can now be any arbitrary location
 * Fixed a bug that caused Boards Manager to install the same tool twice or more, thus wasting disk space, if other cores where using tools delivered by arduino
+* Fixed various Boards manager glitches, in particular when removing a board
+* Windows: Arduino IDE icon is now in high definition, bye bye that blurry icon
 
 [libraries]
 * SPI: Added SPI.transfer16(...) function to SAM core.