increased max length of error code to 4 chars; updated genomics_cancer_v3 with v3.2 changes (incomplete); amended date & datetime placeholders on results entry page to match expected data format; updated Makefile.PL & module_build.pl
spell-check changes: add-new-word function now puts terms in temp file for assessment by admin before importing into site-specific personal dictionary; rebuilt en-medical.rws (extra-dict) from edited contents of old personal dict (.aspell.en.pws) - moved all acronyms/abbreviations into new personal dict (.aspell.leeds.pws); LIMS::_create_user_profile() adds users 'centre' param to session user_profile; adapted spellchecker.pl to work with new dictionary format
