Stop auto-download of FirePHP as that project is no onger maintained. devel-download command can still fetch it for you but now not automatically after a pm-enable devel.

(cherry picked from commit aaebf6b9)

Issue #1839854 by salvis: Fixed Nonexisting functions triggering fatal error in function backtrace_error_handler().

Issue #1739808 by salvis: Make sure we don't throw notices in the error handler when the backtrace is missing the 'args' value.
(cherry picked from commit 5d5fa9a4)
(cherry picked from commit 88b3d37a)

Issue by salvis: Fix backporting error in backtrace_error_handler() that caused bad classification of errors.

Juampy NR authored May 19, 2012 and Moshe Weitzman committed May 21, 2012

Issue #1421882 by juampy: Allow the output of fn-view --pipe to be formatted for opening it with an editor

Added a format option.

Issue #1163356 by jonathan1055: Add error handler option to display backtrace as well as standard message.

(cherry picked from commit e742103d)

(cherry picked from commit 1fc15de7)

(cherry picked from commit 914fe344)

(cherry picked from commit f801b407)
(cherry picked from commit 373d2387)

#1076478 by TravisCarden: Rename krumo's 'schablon.com' directory to 'white' to restore the 'white' skin.
(cherry picked from commit 7535cc03)
(cherry picked from commit dcb2afe6)

Issue #694308 by Garrett Albright, Island Usurper: Fix Strict warning: Non-static method krumo::_debug() should not be called statically.