Metacat

Add unshedulejob to base class

Add session Validation action and session timeout functionality.

Fix spelling in debug statement

Added workflow scheduler directory with supporting files

Make properties handlers implement an interface so you can use configurable or non-configurable properties.

Change location of PropertyService to properties directory

Persist skin properties across installations

Change MetaCatVersion to MetacatVersion

Rename MetaCat to Metacat

Move document specific utilities to DocumentUtil from MetacatUtil. This makes it easier to define a layer between the core metacat services and the rest of the code.