local diffs
merge + buggy not working movement in cpp

Conflicts:
	class/playground.R
implemented now warmstart fba in the class system.
left class_old folder to do benchmark with older version eventually.
playing around with parallelization
refined parallization + bug fixing
Even more bug fixing ...
some cleaning and reorganization
siginificant speed enhancement of Population constructor
small test simulation
Merge branch 'sybil' of https://github.com/euba/BacArena into sybil
enter the matrix
enter the benchmark arena ;)
implenting simple growth model
minor speed improvements
Merge branch 'sybil' of https://github.com/euba/BacArena into sybil
added exp growth function and corrected the spec-bug
Merge branch 'sybil' of https://github.com/euba/BacArena into sybil
re-written some Organism functions for speed improvements
Merge branch 'sybil' of https://github.com/euba/BacArena into sybil
added vectorized function of constrain for speed improvements