Split tst/anupqeg.tst into multiple files

[fingolfin]

The test file tst/anupqeg.tst is huge and takes very long; this makes it very difficult to isolate and debug individual test failures. Hence, this file should be split into multiple smaller files.

Note that it is created by tst/make_anupqeg, so perhaps one can tweak that script to generate multiple test files (which could be put into a subdirectory tst/examples/).

[fingolfin]

Related to this: PqExample is huge and complicated and it accesses the same base data from which the .tst files are generated. So when revising this, one should propably revise the whole approach how examples are managed. See also my remark at issue #23.