Bump minor version and add -dev tag.

Bump minor package version number: 0.5.0 -> 0.6.0
Add '-dev' version tag: 0.6.0 -> 0.6.0-dev

configure.in

@@ -1,5 +1,5 @@
 AC_PREREQ(2.60)
-AC_INIT([openocd], [0.5.0],
+AC_INIT([openocd], [0.6.0-dev],
   [OpenOCD Mailing List <openocd-development@lists.berlios.de>])
 AC_CONFIG_SRCDIR([src/openocd.c])