Add ability to accept a configuration files as is

An application package may not parameterize all the config file. In that case, Slider should have the ability to accept one or more config files in a folder that will be copied as is to the application config folder.

Whether these config files over-ride the config file generated by the application package or not is the responsibility of the application package. The recommendation is to prioritize generate configuration files.

This means:

• Application package must fully parameterized a specific config file such that the full file can be auto-generated
• Application package can optionally accept other files to be dropped into the config folder
• User provides configuration parameters (e.g. parameters for the site.xml)
• User may provide a set of files in addition to above (e.g. log4j.properties)
• WHen the application is instantiated
  • default config folder is created when the tarball is expanded
  • this folder is over-written by the supplied config files if any
  • the generated config files are then dropped into the config folder