Package improvements

Implemented new options to Ini format:
**supportArrayValues** enables processing of nested arrays (disabled by default);
**parseBooleanWords** enables emulation of php_ini_string behavior when *yes* and *no* keywords are processed as booleans.

Also several data equality tests: any valid formatted string passed through stringToObject and then converted back to string must not change.

Actually **processSections** option should be supported in `Ini::objectToString()` method so it is included in the test, but it will break compatibility so it is not implemented in the class.