Added missing folders to plugin baking task, updated test
Removed Vendor folder from plugin baking task, updated test
Correct typo.
Forward port fixes for #4294 from 1.3 to 2.x

CakeTime was broken in the same way as TimeHelper was in 1.x. Getting
1969 on invalid input can be very confusing and un-helpful.

Refs #4294
Merge pull request #4290 from ravage84/plugin-task-folders

Updated plugin baking task folder list
Merge branch 'master' into 2.6
Merge remote-tracking branch 'origin/2.6' into 3.0

Conflicts:
	lib/Cake/Console/Command/Task/PluginTask.php
	lib/Cake/Test/Case/Console/Command/Task/PluginTaskTest.php
	lib/Cake/Test/Case/Utility/CakeTimeTest.php
	lib/Cake/Utility/CakeTime.php