Minor typo correction

formely->formerly
Update incorrect docs in tonePitchFollower example

The comments state that the speaker should be on pin 8, but the code references pin 9. Updated the comments to reflect the correct pin.
IDE didn't stop if an invalid library is found
Better error handling for missing preferences.
Fixes #1471
Hardened upload.tool property reading code for boards.txt
Fixes #1464
Merge pull request #1465 from mcoms/patch-1

Update incorrect docs in tonePitchFollower example
assembly compile recipe is missing (C. A. Church)
Fixes #1457
Merge branch 'master' into ide-1.5.x
Merge branch 'ide-1.5.x' of https://github.com/arduino/Arduino.git into reefangel_ide-1.5.x
Added Reef Angel Evolution drivers
Reef Angel Plus bootloader
Reef Angel optiboot bootloader
Board and platform updates for AVR
Board and platform updates for SAM
Evolution binary firmware for ATMEGA26U2
WDT enable