Release 1.5.1

#36 Alerts for new lists are not being sent
#39 Alerts for biocache searches with long queries fail
#51 User account with a changed email address is not being updated
#57 Normalisation of alerts ws calls and biocache service configuration
#62 Region page alerts bug
#64 Build broken due to failed unit tests
#65 Searches with long display titles silently fail
#71 Alerts deletion from the admin section does not work
#73 Incorrect querypath for annotation alerts
#75 Delete orphaned queries from admin not working
#76 Preloaded "citizen science records" query not created in new environment
#77 Test cases simulating alerts process
#80 Make "my annotation" feature configurable
#78 Missing "new occurrence datasets" standard alert type
#82 Flag to switch sending email to the end user on or off