Version bump to 1.6.

Update copyright year in the manpage and regenerate.

Changes needed to build tcllauncher with Tcl 8.6

* Call through Tcl_Init stub

* Invoke Tcllauncher_Init

* Update TEA to latest

* Add generic dir to include search path to find launcher.h

* Link with package objects and Tcl stub library

Don't require "package require Tcllauncher" to get the support procs,…

… something introduced in Tcllauncher 1.3 -- the package is now auto-required by the tcllauncher executable.

Better document the daemonize proc.

Version bump to 1.4.
BUGZID: 8455

tcllauncher v1.2.