Include ChangeLog in distribution

* Makefile.am (EXTRA_DIST): add ChangeLog
Update ChangeLog

* ChangeLog: updated
Fix title of manual

* doc/guile-aspell.texi: modify title
Update ChangeLog

* ChangeLog
Distribute cfg.mk

* Makefile.am (EXTRA_DIST): add cfg.mk
Remove unnecessary configure check for libguile.h

* configure.ac: libguile.h test removed
Post-release bump to version 0.2

* NEWS: now 0.2
* README: now 0.2
* configure.ac: now 0.2
* README.md: removed