Documentation Update - task-color.5

- Added the new task-color man page to the makefile, so it gets installed
  properly.
- Added the new man page in the ChangeLog file.

Makefile.am

@@ -1,6 +1,6 @@
 SUBDIRS = src
 
-dist_man_MANS = doc/man/task.1 doc/man/taskrc.5 doc/man/task-tutorial.5 doc/man/task-faq.5
+dist_man_MANS = doc/man/task.1 doc/man/taskrc.5 doc/man/task-tutorial.5 doc/man/task-faq.5 doc/man/task-color.5
 
 docdir = $(datadir)/doc/${PACKAGE}-${VERSION}
 doc_DATA = AUTHORS ChangeLog COPYING NEWS README