Improvements to regnum2phyx.js

[gaurav]

These are the reviewable changes from PR #89, which are primarily regnum2phyx.js changes:

• Improvements to how author names are rendered: we now support first-name first, last-name first, or last-name only.
• Generate scientific name authorship by using first-name first and combining them with " and ".
• Generate specifier authors by using last-name only and combining them with " and ".
• Added a CLI option to configure the number of digits in the CLADO_ name, which now defaults to 7 instead of the previous 6.
• Modified the script to produce CLADO_0000000 filenames instead of REGNUM_0000000 filenames.

Two other minor changes:

• Added an optional test to ensure that Phyx files have at least one Newick phylogeny in order to see how many we have.
• Removed phyloref_testcase.owl, which was previously a copy of the phyloref.owl ontology we used to do reasoning.

[hlapp]

There are a number of Unexpected console statement warnings, if these aren't spurious and should eventually be eliminated, then it's perhaps worth to log this as an issue. (But doesn't seem worth holding up this PR, hence approving.)

[gaurav]

There are a number of Unexpected console statement warnings, if these aren't spurious and should eventually be eliminated, then it's perhaps worth to log this as an issue. (But doesn't seem worth holding up this PR, hence approving.)

I've added it as an issue: #97