Silenced test output
A couple of additional tests, to get to 100%
Merge pull request #1554 from bashtage/medcouple-silence-tests

TST: Silenced test output introduced in medcouple. Add tests.
DOC: Add vbench docs
MAINT: Lazy copy-pasted version-only function.
DOC: Link to vbench documentation.
Merge pull request #1559 from jseabold/vbench-recover

MAINT: Recover lost commits from vbench PR
ENH: Allow ARMA(0,0) in order selection
Merge pull request #1560 from jseabold/order-select-00

ENH: Allow ARMA(0,0) in order selection