mesh parser; left strip "NAME =" line prefix

@ncatlett This seems to address MESH parsing issues experienced in [build #239](http://build.openbel.org/browse/OR-BR-239).

'=' may exist in the line multiple times so lstrip will be safer

mesh entry causing error:
ENTRY = Cerebral Ventricular System(term_ui=T000860463)|T030|NON|EQV|NLM
(2015)|140610|abcdef