added foreign ID to boulder

and posting of boulder JSON to boudlers/saveOne
python script now uploads scraped boulders to chalkup
unknown grade: ? -> unbekannt

# Please enter the commit message for your changes. Lines starting
# with '#' will be ignored, and an empty message aborts the commit.
# On branch master
# Changes to be committed:
#   (use "git reset HEAD <file>..." to unstage)
#
#	modified:   grails-app/controllers/bcomp/api/GymController.groovy
#	modified:   grails-app/domain/bcomp/gym/Gym.groovy
#	modified:   src/groovy/bcomp/SampleData.groovy
lowercasing email address when login or registering