v0.8.1 Changelog
added Wextra to src compilation flags, ref #53
added dummy constructors for ESOptimizer and CMAStrategy as convenience for declaring object in external classes + used pointer for fplotstream as streams are not copyable

Conflicts:
	src/cmastrategy.cc
	src/cmastrategy.h
support for control of size of in-memory history used in equalfunvals stopping criteria: allows to run in constant-size memory when solving very large optimization problems
fixed warning on comparison in cmasolutions
this appears to fix the un-configuring of bbob when re-compiling the lib without it, ref #52
added missing cmastrategy dummy constructor for usage as a class variable or temporary object with delayed initialization
removing useless NoScalingStrategy dummy constructor, ref #53
Merge branch 'master' into python