#568758 by Mark Trapp | donquixote: Added Devel backtraces should follow Drupal core's handling of E_DEPRECATED.

Attempt to support the PEAR version of Firephp. Untested, but does not break downloaded version (thats tested).

#376824 by moshe weitzman. Query log displays dreaded Fatal error: Exception thrown without a stack frame in Unknown on line 0 on Views pages

use drupal_var_export() instead of var_dump() during our debugging functions. It is more readable. krumo users don't necessarily see much of this.

misc plus refactor of xhprof so that it can be used during drush requests. these requests show a log statement with the xhprof url at the end (verbose mode)