gengis now reject layers with non-numeric location data
changes from Nov 7 discussion

removed richness
fixed Scatterplot for richness
changed name of Environmental Data Query
added description to WorldClim Query
changed MGRast display
added sum combination and only grid on active loc layers
removed white space from site id,
on merging locations intersect of location information is taken
merge location sets takes intersection of sequence data
in location merge defended against missing sequence layers( all or nothing approach )
added sum of counts to alpha diversity calculator
code cleanup
stage1 mac fixes
stage2 mac fixes
stage3 mac fixes
stage4 mac fixes
fixed location merge bug for sequences