bugfix: lib/common.Makefile: $(add*): need to wrap w/ $(wildcard) to prevent "targets don't exist" error, because svn 1.7 does not suppress this error even with --force

bugfix: lib/runscripts/table.run: schema/make calls: need to use `make schema` instead because old-style datasources don't have a top-level runscript (the absence of this identifies them as old-style so inputs/input.Makefile works correctly)

bugfix: lib/sh/util.sh: DON'T do `shopt -s lastpipe` because this causes a segfault on Linux in stderr_matches(). (it also isn't supported on Mac.) use @PIPESTATUS instead. note that we do not currently need lastpipe, since we use @PIPESTATUS (which actually provides more functionality for our purposes).

fix: lib/sh/util.sh: echo_func(): file/line #: display with regular color because the lighter color actually draws attention to rather than away from the faded text

lib/sh/util.sh: added plain()

bugfix: lib/sql_io.py: put_table(): is_literals: `return sql.value(cur): need to use sql.value_or_none() instead to support multi-row functions, such as _split() used in specimens data`

lib/runscripts/util.run: on_exit(): documented that users can also override gateway()/fallback() to perform other commands (or no commands) after the script is read

bugfix: lib/sh/db.sh: pg_table_exists(): need ! to negate boolean result

fix: lib/runscripts/table.run: table_make_install(): need to inform the user when it skips installing a table, because this is often unexpected

fix: lib/runscripts/util.run: run_args_cmd(): need to indent the output of the target that it's running