- Remove buildvars_funcs.sh, its code has been moved into set_tmpl_common_vars().
- Move stripping code into its own file, and don't run it via fakeroot.
- Remove unnecesary reset_tmpl_vars() call in install_pkg().
- Misc changes.
- Prefix all messages with 'Package 'pkgname (version)': ..." to really
understand what's going on. Add more messages in some stages...
- Do not run pre/post_{configure,build,install} or do_{build,install} stages
if they were executed successfully in the past.
