JIRA-254: correct image dimensions. Added new template tags: iip_url and iip_img to allow customisation of the image dimensions in the django templates. Fixed the width to 200px on the Browse Images page.
Merge branch 'master' of github.com:kcl-ddh/digipal
JIRA-254: externalised the pagination of the Browse Images template to avoid code duplication. Also tidied up the template in the last commit.