extending XLS parsing script to deal with all generated XLS files
index data tables on manuscript id, abstract lcation of data tables
added wrappers for indexing receieved, manuscript and subjects
simplified author map, added getter for abstract
support for indexing author properties by articleid and authorid
abstracted calls to author attributes
support for all author col names
removed commented out code
Need to specify encoding after all.
display-channel as the first subject in article-categories.
Additional article-categories.
Research organism keywords.
Empty back matter.
Competing interest conflicts, one per author, and a default if no conflicts exist.
Optional competing interest section, and move conflict default text.
Ethics information.
created a dict to map all of the names of column headings

removed calls to get author address lines, telephone and fax details, we don't
use these in the creation of the XML
Merge pull request #56 from gnott/article-categories

Article categories
Merge pull request #54 from gnott/entity-to-unicode

Need to specify encoding after all.
merged version