DATACMNS-363 - Improved support for unicode characters for repository query methods.

In order to find a keyword like "And" followed by a property name we now probe also for non Basic Latin characters in addition to just an uppercase letter. This is needed to support property-names with characters that don't have an upper or lowercase representation. This allows us to support finder methods like: findBy이름And생일OrderBy생일Asc(…).

Original pull request: #47.