strip less-/greater-than signs from eprint titles

Added tests for two records:
* http://searchapi.scopus.com/documentSearch.url?format=XML&apiKey=XXXXX&search=title(%22Kaolinite+particle+sizes+in+the+%3C2+%CE%BCM+range+using+laser+scattering%22)+and+authlastname(Mackinnon)+and+pubyear+is+1993
* http://searchapi.scopus.com/documentSearch.url?format=XML&apiKey=XXXXX&search=title(%22Scaling+of+free+convection+heat+transfer+in+a+triangular+cavity+for+Pr%3E1%22)+and+authlastname(Saha)+and+pubyear+is+2011

Both fail before this patch, and pass after.

Note that the first title also includes a 'micro' symbol.

closes #16