* [FIX] When the SWI-Prolog site is down missing packs are not downloaded and the project simply starts.
* [AP_STAT,SC] Use of ISO8601 dateTime simpler than HTTP header dateTime.
* [DATETIME_EXT,SC] Since this is a low-level module the predicate that were usign HTTP/XSD features are now moved to their appropriate standards modules HTTP and XSD_DATETIME.
* [HTTP,SC] Relocated http_dateTime/2.
* [DIR_EXT,FILE_EXT,SC] Removed superfluous module imports, making these modules more low-level.
* [RDF_GRAPH,FIX] Graph name fix. Graph naming should be professionalized at some point...
* [RUN_EXT,NEW] Added run_jar/2 and added run_program/2 to public predicates.
* [XSD_DATETIME,SC] Relocated POSIX-related predicates.