Refactor local block functions and add additional functionality.
Fix import namespace
Fix doc string examples
Update test cases for block functions
Update doc string for new functionality
Rename block_* functions to local_*
Fix deprecated function name referneces in doc strings
Use pad function and add option to define cval
add coffee picture from flickr
add example HT for ellipse
add extra comments
fix title
rename files
fix doctest
PEP8
fix Johannes' comments
use shorter URL
revert, accum is a tuple of lists
Refactor rank filter package for consistent naming
Use typed memoryviews in rank filter package