tune pgsql8_index dimension quoting

only quote when it is a valid identifier

using refactored format::is_valid_identifier()
extension wiring for is_valid_identifier() for format bases that do not extend sql99
fix pgsql8 function extraction for functions with ampersands in the definition body source
update DBSteward PEAR packaging to use PEARCrater, update PEAR dependencies for DBSteward packaging and unit testing
transition master to version 1.3.8 -- 1.3.7 has been released
update pear package dependencies
notes on upgrading DBSteward pear package
Add composer.json