Fix eupspkg.py doc

The note on lines 65-66 appears to be a historical artifact; eupspkg.cfg.sh shouldn't need to be executable, and the need for ./ups/eupspkg to be executable is documented below.

The URL in the doc at line 77 has an extra "/DMS" in it.
Merge pull request #12 from ktlim/ktlim/doc-fix

Fix eupspkg.py doc