fixes 662

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fixes 602

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now the footer links opens in new window
add drop-type support for rake db:migrate:clean

This is needed since we now create Types
in some migrations.
Merge pull request #678 from ontohub/662-open_help_in_new_window

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Updated rails to 3.2.17.
add the missing public_r method.
adjust ssh_access_controller for useful errors

The controller should now always return a valid response,
in the sense of communicating with the command-line script.
If an error occurs the json contains the error-information.
add spec to test out the ssh-access controller.
change hets date checking to revision checking.
document the extended postgresql-types method.
Merge pull request #696 from ontohub/fix_rake_db_migrate_clean

add drop-type support for rake db:migrate:clean
Merge branch 'fix_hets_version_checking' into 702-fix_git_clone
Merge pull request #704 from ontohub/fix_hets_version_checking

Change hets date checking to revision checking.
Merge pull request #703 from ontohub/702-fix_git_clone

Repair git clone, fixes #702.
adjust hets path for Mac OS X homebrew compliance.
Merge pull request #711 from ontohub/fix_hets_path_for_homebrew

adjust hets path for Mac OS X homebrew compliance.