Correct a test regression

If t/interpolate is run twice between a "build distclean", a value
set in the test is retained across test runs.
Rename the config variable to be alien specific
Reset config info after test
fix POD error and include new contributors
update MANIFEST
include license file
update changes
Merge pull request #48 from plicease/housekeeping

Housekeeping (inferring an "aye" from the submitter)
Merge pull request #37 from MidLifeXis/regression_t_interpolate.t

Correct a test failure in t/interpolate.t