Generate choices for programmes groupped by year based on SCHOOL_PROGRAMME_MAP
Show programmes only for the current year on index pages
Show programmes in the current year only (except for gallery index)
Gallery page: change related programmes when selecting a year
Merge branch 'develop' of github.com:torchbox/verdant-rca into develop
Simplyfied code for programme_choices a bit
erroneous reference to 'news' on talks listing
Merge branch 'develop' of github.com:torchbox/verdant-rca into develop