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Fixing bug where Clone MOOSE action would clone to the users home
directory instead of the workspaces because the ICETests extension
specified the home directory, and that parameter was not reset. 
Signed-off-by: Alex McCaskey <mccaskeyaj@ornl.gov>

This commit fixes a bug where the cloned repo wasn't added to the git
repositories view. Also, it adds code to check for the user credentials
on a git repo if need be. 

Added an extension point that let's users clone the ICETests repo from
github. To acheive this, I added the ability to provide custom
parameters to a given command. The ICETests extension point uses this to
specify the clone directory as @user.home.
Signed-off-by: amccaskey <mccaskeyaj@ornl.gov>

This commit updates the developer abstract handler hierarchy with a
GitCloneHandler that simple clones a repository, but provides a hook for
subclasses to provide PostCloneTasks, such as importing projects or
creating make targets. 

This commit also provides a new Build ICE command that grabs the
ILaunchManager and uses it to launch ICE's Maven Build launch
configuration files. 
Signed-off-by: amccaskey <mccaskeyaj@ornl.gov>

Setup the ICE Developer Menu generation utility to create parameterized
commands where the parameters are all the attributes from the provided
extension point. 
Signed-off-by: amccaskey <mccaskeyaj@ornl.gov>

This commit adds a new extension point that lets users easily add new
developer-related actions to the ICE Developer Menu. 

Added an extension for ICE and MOOSE - with MOOSE providing the existing
developer actions we had before. I've turned off the action buttons that
were in the toolbar for MOOSE previously. 
Signed-off-by: amccaskey <mccaskeyaj@ornl.gov>