* Many default variables read from files instead of being hard coded.
* Added default files for all instl (main.yaml) and for specific classes (instlAdmin, InstlClient).
* Fixed ConfigVar.__str__ so values appear before description.
* Removed redundant imports from helpHelper.py.
* Refactored InstlClient to work with standard do_ ... functions for commands.
* InstlClient.installState is now a member.
* InstlClient.init_copy_vars moved from instlInstanceBase.
* New yaml doc type !define_const - will create const variables and will not except __include__'s.
* instlInstanceBase.get_default_sync_dir overhaul  - will use $() variables and will need resolving.
* Sync command adds __NUM_FILES_TO_DOWNLOAD__ variable with the number of files to download.
* got rid of redundant __ALLOWED_COMMANDS__ variable and checking.
* parallel_run.py: plain exit() did not work in compiled code, replaced with sys.exit().