update.
(PACKAGE): New variable. (TAR): New variable. (RM): New variable. (CP): New variable. (tar): New target.
(VERSION): Update to 1.2.
(install.so): install canna.so with version name; make symbolic-link from canna.so.$(VERSION) to canna.so instead of symbolic-link from canna.so to canna.so.$(VERSION).
Use emacs based configuration.