Better wording that includes the species that has the change
We can print the marks as long as the blocks are consecutive on the query genome
Double-gaps are not shown
Fixed the formula of "s3l" (the gap between two consecutive blocks) when they are on the negative strand
Merge pull request #135 from muffato/alignimage_wording

Alignments Image view (fix ENSWEB-945 / RT#415651)