rename getProcessingPlugins to listProcessingPlugins; completed initial documentation for experiment daq api; add target directory functionality for uploads

added ability to specify target directory for daqs/uploads; added max runtime option for daqs; added ability to specify upload of a directory after exit for daqs

added updated version of the portal that works with the new schema; fixed filter issues; upgraded to primefaces 6 and jdk8; added views for station; removed currently unused views for policies

enhanced daq processing algorithm to avoid resource starvation between simultaneous DAQs and uploads