MAINT:Subclass OptionParser to change error method

Instead of printing the script usage information and an error message,
only the error is printed now.
MAINT: Bump version to 0.1.1
ENH: Add error_prefix option to factory function
EMH: Address @jairideout comments
Merge pull request #265 from ElDeveloper/optparse-subclass

MAINT:Subclass OptionParser to change error method