More Glossary Terms

Added Command Directive and Journal File.  Word wrap touched a couple
of entries.
Word wrap; alphabetical order.

trivial changes.
Merge pull request #266 from merriam/master

Glossary updates...
Two more Ledger terms

Added automated transaction and periodic transaction, two items that
horribly misnamed.
Merge pull request #267 from merriam/master

Two more Ledger terms
Two more terms.

Added posting and virtual posting.
Merge pull request #268 from merriam/master

Two more terms.