v0.5.5

This version contains Unicode and tope logic-related fixes:

1. Fix (add missing checks) for subshapes (see #85);
2. Allow to handle wildcards in rzk itself (see #83);
3. Fix Unicode on machines with non-standard locales (see #82);
4. Specify happy and alex as build tools to fix cabal build from Hackage (see #80).
5. Add configuration for MkDocs plugin for Rzk (see #79).