* doc/install.texi (Prerequisites): Refine some wording on
	bootstrapping and ksh.
	Move the version numbers of DejaGnu here from the testing section
	and fix casing of names.
	Fix markup and clarify wording for autogen requirements.
	Refer to GCJ instead of just java.
	Refer to SVN instead of CVS.
	Describe diffutils as useful instead of necessary.
	(Downloading the source): Refer to SVN instead of CVS.
	Adjust a link to our web site accordingly.
	(Configuration): Fix casing of Bison.
	(Specific): Avoid reference to CVS.
	(Building): Refer to SVN instead of CVS.  
	Fix a sentence on the use of Bison and remove duplicate (and
	incorrect) version number of Bison requirement.
	Remove one redundant list of packages needed for building.

From-SVN: r112696