grails: hibernate & tomcat versions; upgrade

grails upgrade 2.3.7 after https://github.com/DICE-UNC/idrop/issues/2
Typos in user-interface text not yet i18nalized
Merge pull request #11 from ajm475du/master

Upgrade to grails 2.3.7 and fix a couple typos
#14 cleanup login
4 merge with master
#14 prep for creating and announcing downloads
#14 merge dev into master
upload errors #15
upload errors #15
#15 fix
Remove possibly deprecated build.sh script, use grails war instead as the docs state
Merge pull request #18 from brainstorm/master

Remove possibly deprecated build.sh script, use grails war instead
Broken build/deploy script for idrop-web #16
Migration to Grails 2.4.x complete, fixes issue #16
Fixes runtime spring expression and issue #20
Further migration tweaks to Grails 2.4.x, more undefined classes to come
Sitemesh deprecated according to http://grails.org/doc/latest/guide/upgradingFrom23.html
Merge pull request #19 from brainstorm/grails_2.4.0_upgrade

Migration to Grails 2.4.x, fixes issue #16, #20 and others
#23 merge and fix nullable resource
#23 merge into dev