Changes for Module::Build::Pluggable::PDL

0.22 - Mon May 20 10:06:46 EDT 2013
    Fixes issues in smoke testing and on alternate OSes
    - Adds missing prereqs
    - Processes pod with Pod::Perldoc rather than external call to perldoc
      and shell piping (hopefully this will work better on alternate OSes)
    - Ensures we are using the current perl to run things under tests

    Moves actual conversion code to its own sub

0.21 - Thu May 16 11:28:21 EDT 2013
    Fixes bug in add_extra_linker_flags

0.20 - Thu May 16 10:36:21 EDT 2013
    Initial release of Module::Build::Pluggable::PDL
