Use 'MRB_METHOD' macro
Use 'MRB_FUNCTION' instead of 'MRB_METHOD' for modules
Add "[Binding]" config subgroup

Binding specific configuration goes here. It is stored as
a String->Value hash.
Add support for compiled ".mrb" scripts

A compiled ".mrb" script can be specified in the Binding config
subgroup with key 'mrbFile='.
If a 'customScript' is specified it still takes priority however.
Remove empty line