updated UCSF Images module to version 7.x-2.3

fixes #50
Merge pull request #51 from stopfstedt/update_ucsf_images_module

updated UCSF Images module to version 7.x-2.3
bumped core version to 7.32

fixes #53.
Merge branch '7.x-1.x' of github.com:ucsf-drupal/ucsf_installprofile into 7.x-1.x