New timestamp format.

Logger timestamp format 2011-02-22 04:15:20 with letter %T
Unnecessary error object logging removed.

It was writing an error object to the log file with all
html formatting, what is wrong.
Merge remote branch 'upstream/devel' into devel

Conflicts:
	lib/Dancer/Error.pm
Merge branch 'devel' of https://github.com/sukria/Dancer into devel
Slight clarification to documentation for after hook.
Try to fix 641
Add simple test
Fix #499: system() fails with -1 in dancer
Tidied some code in PSGI handler.

This is a bit less and, to my mind, simpler code to maintain.
Added POD to PSGI handler.
Improved warning localizations.

This reduces the possibility of inadvertently catching a warning from somewhere
other than the user code this warning catching intends.
Corrects small typo in Dancer::Plugins pod
Some extra docs
Merge branch 'topic/some_docs' into devel
Merge pull request #660 from olof/pr/plugins_pod_typo_fix

Correction of small typo in Dancer::Plugins pod
Merge pull request #658 from chromatic/pr/psgi_handler_improvements

Pr/psgi handler improvements
Merge pull request #659 from chromatic/pr/improve_local_scope

Improved warning localizations.
Merge branch 'devel' of https://github.com/sukria/Dancer into devel
Add tests for #499
Fix #663: Standalone handler tests broken