Feature/503 build includes install scripts

This branch changes the build.xml script up to do a few things:
- Adds updatePackageXmlManaged which includes the installClass and uninstallClass
- Removes runAllTests from deployManagedUAT to allow for quicker Cinnamon tests where we just want to deploy the package rather than deploy and then run Apex tests.  Jenkins can still add a build step to call the ant runAllTests target
- Removed "Cumulus" from as much of the build.xml as possible including target names (i.e. uninstall instead of uninstallCumulus
- Move CumulusCI configuration specific to the package to cumulusci.properties file