Alan Wood Pesticide Compendium Adress has moved

[andschar]

The address of the Alan Wood pesticide compendium has moved from http://alanwood.net/pesticides to https://pesticidecompendium.bcpc.org. Needs to be updated in function.

[stitam]

Hi @andschar thanks for flagging this!

[Aariq]

Closed with #339