Remove deprecated ports:

2020-08-15 archivers/py-backports.lzma: Uses deprecated version of python
2020-08-15 archivers/py-bup: Uses deprecated version of python
2020-08-15 archivers/py-librtfcomp: Uses deprecated version of python
2020-08-15 audio/blop-lv2: Uses deprecated version of python
2020-08-15 audio/bs2b-lv2: Uses deprecated version of python
2020-08-15 audio/py-gmusicproxy: Uses deprecated version of python
2020-08-15 audio/py-karaoke: Uses deprecated version of python
2020-08-15 audio/py-openal: Uses deprecated version of python
2020-08-15 audio/py-py-jack: Uses deprecated version of python
2020-08-15 audio/py-xmms2: Uses deprecated version of python
2020-08-15 audio/triceratops-lv2: Uses deprecated version of python
2020-08-15 biology/py-biom-format: Uses deprecated version of python
2020-08-15 comms/py-bulksms: Uses deprecated version of python

Deprecate a few ports

With hat:	portmgr

Reduce dependency on the python2 metaport

PR:		225752
Submitted by:	Yasuhiro KIMURA

Update ports in the [bcd]* categories to not use GH_COMMIT.

With minor cleanups to make things simpler.

With hat:	portmgr
Sponsored by:	Absolight

Update "BSD" license in devel category

Cleanup plist

- Convert ports of devel/ to USES=python

Approved by:	portmgr (implicit)

Python cleanup:
- USE_PYTHON* = 2.X -> USE_PYTHON* = 2
- USE_PYTHON* = 2.X+ -> USE_PYTHON* = yes
Reviewed by:	python (mva, rm)
Approved by:	portmgr-lurkers (mat)

- Enable staging in a few ports of mine

Add NO_STAGE all over the place in preparation for the staging support (cat:
devel part 3)

tvrage is a python based object oriented client interface for tvrage.com's
XML based api feeds.

The tvrage package consists of three modules:
 - feeds module provides a wrapper function for each of tvrage's XML-feeds
 - api module provides an clean and object oriented interface on top of those
   services
 - quickinfo module is a simple pythonic wrapper for tvrage's quickinfo api.
   Values are returned as python dictionaries rather than dedicated objects
   for tv shows and episodes

WWW: https://github.com/ckreutzer/python-tvrage

Approved by:	culot (mentor)