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

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

add ldap user info object that will be used for ldap-based utilities; introduce ldap create user functionality