philippkraft/cmf: Bracket access for solute storages

cmf 1.4 is mainly a bug / documentation fix release, with mild enhancments. Major enhancment is the bracket access for solutes, however, not all tutorials / demos are already updated. Fixed issues: Bugs and inconsistent equations #46 pip install cmf fails for linux / mac os #37 Shuttleworth-Wallace: Inconsistent behavior in wet to dry leaves transition #38 Surfacewater: Inconsistent methods to calculate covered area Enhancements: #31 More crossection types can be implemented on demand #29 Bracket access to solute storage #50 New connection names are already available as alias Documentation #45 Technical Flux and Waterbalance Tutorials need reworking #30 Error API Manning equation #35 GIR of ShuttleworthWallace descriptio