HelperFormElement, KeyValueStringParser, AbstractBuildFormd, Constants, Database: All Exceptions supplied with an error code

AbstractBuildForm:  Select Statements might contain empty lists. First version of editlink(). Subrecords with links to detailform.

Form: Error Message if multiple forms have the same name.

Store: in function fillSip added parameter 's' and 'SIP_URL_PARAM'.  getStore() now handles non existing stores well.

Sip.php: renamed urlParamToSip to queryStringToSip, getSipFromUrlParam to getSipFromQueryString. Added getQueryStringFromSip

AbstractBuildForm: subrecord extended with Prameter 'form' and 'detail'. Renderung subrecord columns rewritten and two new columntypes added: 'url', 'mailto'

*: Namespaces of helper classes changed to qfq. New Class 'HelperFormElement'. HTML 'fieldset' implemented.

AbstractBuildForm, BuildForm*: refacored BuildForm to AbstractBuildForm. Code get's much easier to understand.

BuildForm.php: New implemented rendering in plain and table mode. Subrecords will be displayed at the correct place. In table mode the submit button is directly below the form.

FormBuildPlain.php: first simple version of subrecord implemented