Extracted package specific configuration from install.conf into package specific conf files.
Renamed install.conf to general.conf to reflect its new role.
Modified file description header to reflect new name and role.
Now ignoring all files of type conf in conf directory.
Refactored conf sourcing to support loading by file name.
Each package specific setup script now sources its package specific configuration.
Package configuration existence check (as well as creation) added.
Fixed calls to source_conf
Moved jsoncpp initialization ahead of bullet and boost so when boost gives an erroneous failure the next set up completes nearly instantly.
Extracted true/false constants into setup_common.sh
Added SHA1 hashing (for file integrity verification) configuration options.
Merge pull request #22 from NASA-Tensegrity-Robotics-Toolkit/setup_refactor

Setup refactor