fix: lib/runscripts/file.pg.sql.run: removed include of in_datasrc_dir.run, because this location does not apply to all .sql export scripts
*{.sh,run}: use new begin_target instead of `echo_func; set_make_vars`
lib/runscripts/file.pg.sql.run, schema.pg.sql.run: support custom options to pg_dump in $@
moved everything into /trunk/ to create the standard svn layout, for use with tools that require this (eg. git-svn). IMPORTANT: do NOT do an `svn up`. instead, re-use your working copy's existing files with `svn switch` (http://svnbook.red-bean.com/en/1.6/svn.ref.svn.c.switch.html).
bugfix: lib/runscripts/file.pg.sql.run: export_(): exclude Source and related tables so that these will be re-created by the staging tables installation instead, ensuring that they are always in sync with the Source/ subdir
added lib/runscripts/file.pg.sql.run and use it in schema.pg.sql.run