Changed memory usage check to only fail build on 100%+ usage and added a
configurable warning level for memory usage defaulting to 75%.
Clarified error and warning messages related to memory usage to specify
that this is the minimum memory usage.
Adds a checkbox to the preferences dialog that controls whether or not
to verify code on upload via serial (verification still always occurs
when uploading using a programmer). It is checked by default to match
current behavior.
Made some helper class for files filtering.
platforms.txt now contains only one platform at a time.
Some cleanup in Compiler and AvrDudeUploader classes.
This reverts commit df9835efafd13685251749bc210c0b96a18a96a5, reversing
changes made to ec45af8bfa9222a807c075dd1db4b5aa798bba03.
Conflicts:
hardware/arduino/variants/mega/pins_arduino.h
libraries/Ethernet/examples/PachubeClientString/PachubeClientString.ino
