add setWindowPosition and setWindowName to PCLPlotter
Add a family of has_field meta-functions
Add tests for has_field family of meta-functions
add spaces between function names and braces
Merge pull request #462 from taketwo/add-has-field

Add a family of "has field" meta-functions
Merge pull request #457 from billmuch/master

added setWindowPosition and setWindowName to PCLPlotter