Add series package test

[a-maier]

This adds a test for my series package.

[jodavies]

(For now) you need to fetch your library file in three different places, for the normal tests, the valgrind tests and the coverage tests.

[jodavies]

It looks like this is not clean under valgrind... something to investigate already!

[jodavies]

jodavies@b19ccb4

This fixes the memory leak in your test.

[jodavies]

If you rebase on master now, the tests should pass

[jodavies]

@a-maier if you rebase on master now that #686 is in, and bump the "v1" on the cache name to "v2", it should build a new cache and not fail to wget color.h from nikhef.nl this time.

[coveralls]

coverage: 50.874% (+0.001%) from 50.873%
when pulling f15ef8d on a-maier:series-tst
into eebd42d on form-dev:master.

[jodavies]

Great, thanks for the extra tests!

[jodavies]

Ah -- somewhere, this coverage runs for the extra tests got messed up. There is a double "--timeout" arg given to check.rb, and it does not run any of them. I'll prepare a fix...