Remove lxml

• lxml dependencies (Notes, website parsing) remove to reduce the size of docker image
• parse showdown as streets, cause actions like collected are included which needed for earnings calculation
• players in winner section does not contain special positions like button, sb, bb in name
• minor bugfixes

Earning calculation

• The new release contains the calculation of earnings for the poker hero,
• Also all streets, means preflop, flop, turn and river are IStreet objects now and the actions are all parsed.
• Actions for posting SB and BB are added
• Actions for cashout are parsed and included to earnings

JSON encoding of PS HH

Feature to encode a pokerstars hand history into json.