Added option to specify genomes using 'gid' from URL
added database debugging to init through an option 'debug=>1'
rewrote function has_access_to_genome to use a local stash of genome ids specific to the user.  Performance gains when a user object is used multiple times to check on genome permissions
added 'gid' as an option for specifying genomes; fixed parameters bug when initializing a coge object
Merge branch 'master' of https://github.com/LyonsLab/coge