v4.5.0

v4.5.0, 2019-01-31

Implemented algorithm for memory depth of Finite State Machines, some new
strategies and some minor internal improvements.

• Algorithm for memory depth of Finite State machines
  #1233
• Minor refactoring
  #1223
  #1227
  #1225
  #1222
• Speed up of cache
  #1229
• New strategies
  #1228
  #1231

v4.5.0...v4.4.0