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

reworked reporting for both daqs and uploads; improved ftp utility efficiency; simplified file processing

modifications to eliminate processing of hidden files and of unchanged files that were processed already; checksum is now done by default

fixed few issues found while testing gridftp plugin and file observer; made observer more generic by shifting some functionality to agent

changed file processing interface; added support for relative file paths (with respect to daq directory)