science/veusz: Unbroke; Renamed to science/py-veusz.

It was breaking because of wrong python shebang.

This port is a python port, renamed per section 6.17.

Unbroke:

• Added USES=shebangfix and SHEBANG_FILES
• Added stripping (post-install)

Additional changes:

• Added USE_QT4
• Added USE_PYTHON=concurrent

Approved by: tcberner (mentor, implicit)
Approved by: portmgr (port compliance, infrastructure)