JBAS-415 brick updater additions

JBAS-415 brick updater additions

* If no branch/tag/pull options are specified, install whatever code is
  present in the repository

* Toggle -c.  No configure/clean is run by default.

* If no client build ID is specified, use the current date

* Run build commands as the owner of the current directory, not
  necessarily as opensrf.

* Move all post-install steps into the main script to finalize support
  for running the script as a non-opensr user.

* Adds support for a code series (-i) parameter for symlinking the
  staff client to support persistent intra-series links.

* eg-updater.sh -x now builds a Windows staff client.

Signed-off-by: Bill Erickson <berickxx@gmail.com>