FIX: Fixing doctest quirk
Merge pull request #353 from Eric89GXL/doctest-fix

FIX: Fixing doctest quirk
ENH: Cleaner utils and testing
ENH WIP: Adding notch filtering
FIX: Uncommenting useful lines
ENH: Adding F-test for significant sinusoidal components
FIX: Unused parameter
ENH: Adding example, better performance
FIX: Fixing typos
Merge pull request #354 from Eric89GXL/restore-changes

ENH: Cleaner utils and testing
FIX: Speeding up dpss, minor fixes
FIX: Fixing band-stop check
FIX: Fix info
FIX: Only print if verbose
ENH: More informative error messages
FIX: Minor adjustment
FIX: Only need to check if str
FIX: Minor change
FIX: Making changes simpler
PEP8