v1.1.0

This release

• updates the previous implementation of CKM parameterizations, replacing approximate by exact relations,
• adds the new $\beta$ - $\gamma$ parameterization, in which all CKM elements are expressed in terms of the CKM elements $V_{us}$ and $V_{cb}$ and the Unitarity Triangle angles $\beta$ and $\gamma$.

Both improvements have been contributed by @peterstangl in #4.