Add a note about dependency on CHECK package in INSTALL.
Add a note about dependency on CHECK package in INSTALL.

- See IssueID #142


alco90/soml,lees0414/EUproject,mytestbed/oml,mytestbed/oml,mytestbed/oml,alco90/soml,lees0414/EUproject,lees0414/EUproject,mytestbed/oml,alco90/soml,lees0414/EUproject,alco90/soml,alco90/soml,lees0414/EUproject,mytestbed/oml