created Join. Also created BuildWhere class to build where clause.
check if $name is an object, just in case $name is a function name
add isQuoted method.
supports alias. adds alias as prefix to the column name.
refactor building where clause a bit.
may support db that has different chars to quote.
SqlBuilder to build Join clause.
quote to support optional prefix when quoting.
add prefix in Order clause.
add prefix to Where clause.