kohabug 1776 - enable daemon controls scripts for 'dev' mode

kohabug 1776 - enable daemon controls scripts for 'dev' mode

The daemon control scripts (koha-zebra-ctl.sh, koha-zebraqueue-ctl.sh,
and koha-pazpar2-ctl.sh) are now copied and installed in a
runnable fashion for a 'dev'-mode install.  By default
they are installed in the bin subdirectory of the runtime
directory.

Also:

* the control scripts now work if the EUID is other
  than root (as would be expected for a 'dev' or 'single'
  install).
* Split the SCRIPT_DIR installation target into
  SCRIPT_DIR (scripts to copy regardless of install mode)
  and SCRIPT_NONDEV_DIR (scripts to copy to SCRIPT_DIR
  unless the install mode is 'dev').

Signed-off-by: Joshua Ferraro <jmf@liblime.com>