Use spaces instead of tabs in phpunit config file
Bump PHPUnit dependency to v4.2.0
Huge set of renames

PeachySQL namespace -> PeachySql
PeachySQL class -> Peachy
TSQL class -> TransactSql
MySQL class -> Mysql
SQLResult class -> SqlResult
MySQLResult class -> MysqlResult
SQLException class -> SqlException

Also renamed corresponding test classes
Removed unnecessary instance check
Added PeachyInterface
Remove getQuery() SqlResult method (will be unnecessary once generateQuery() is available)
Update readme with proposed API changes