Change PubMed display names to match official versions.

Change PubMed to include 'Central' in the names displayed. and put europe in the right place

Also change description of PM Database to change 'literature' to 'data'...
Use the new Ruby 1.9 hash syntax.<br>Line is too long. [109/80]<br>Prefer single-quoted strings when you don't need string interpolation or special symbols.