Added templates: IIS Application Pool - Create & IIS Application Pool - Delete

IIS Application Pool - Create:
Creates or Reconfigures an Application Pool, including Name, Identity
Type, User Credentials, AutoStart, CLR Version, Pipeline Mode

IIS Application Pool - Delete:
Deletes the specified application pool.
Fixed parameter text for IIS Application Pool - Delete
Streamlined AppPool Create/Delete Templates, Suppress Reboot for Windows - Ensure Features Installed

Refactored variables and step names to follow conventions in similar
steps.

Added SuppressReboot parameter to "Windows - Ensure Features Installed"
step to avoid issue where DISM.EXE can prompt for a reboot and hang the
Tentacle's script execution.
Merge pull request #60 from Zagrophyte/master

Added Templates: IIS Application Pool - Create / IIS Application Pool - Delete