rename genome object variables

Replace the names with dsg to genome. The objects type can be easily
inferred.

	modified:   web/SynMap.pl
Update forms in SynMap

Forms are now wrapped correctly in a form tag and all elements now have
a name attribute.

	modified:   web/tmpl/SynMap.tmpl
Add better error reporting to SynMap

Submitting an analysis is now done as a post request. A success field is
part of the response which indicates whether the job has been scheduled.

	modified:   web/SynMap.pl
	modified:   web/js/synmap.js
move functions into private scope

	modified:   web/SynMap.pl
	modified:   web/js/synmap.js
Fix bug reference error to generate_gff

	modified:   web/GenomeInfo.pl