Improve taxon search

[kazlauskis]

Replace ae with e (since many people confuse this spelling) Remove all non-alphanumerics.

This means you can search for Robins pincushion and find Robin’s pincushion for example.

[johnvanbreda]

Further to this, I found:

• the current search did not tolerate spacing issues, for example black headed does not find black headed
• no support for * wildcards, for example *barnacle did not find anything.

[sacrevert]

This is still slightly frustrating (Robins pincushion example), and seems to me like a low-hanging fruit with significant benefits for reducing user annoyance