Minor repairs to ACQ / EDI admin docs

[Bill Erickson]

Confirmed in Evergreen master, but likely affects all versions.

Bits of EDI configuration documentation are inconsistent or inaccurate within these two files:

docs/admin/acquisitions_admin.txt
docs/admin_initial_setup/ordering_materials.txt

The best description is a patch! En route...

[Bill Erickson (berick)]

http://git.evergreen-ils.org/?p=working/Evergreen.git;a=shortlog;h=refs/heads/user/berick/lp1326806-acq-edi-doc-repairs

* Avoids the use of "*.epo" suffixes, since those are vendor-specific.

* Fixes an inconsistency with the "Account" field, which was correct (and well said) in admin/acquisitions_admin.txt but incorrect in admin_initial_setup/ordering_materials.txt

* Fixes some faulty descriptions of Path/Incoming directories. Of note, both represent directories on remote (vendor) servers.

[Ben Shum (bshum)]

Those changes to the docs makes sense to me. Picked to master, rel_2_6 and rel_2_5, thanks Bill!