minor changes
Merge branch 'master' of https://github.com/lmarmiesse/FlexFlux.git
mean of the values of the attractor
Merge branch 'master' of https://github.com/lmarmiesse/FlexFlux.git

Conflicts:
	src/flexflux/analyses/FBAAnalysis.java
	src/flexflux/general/Bind.java
Added help : FlexfluxHelp
Added "not constrained" for variables in an FBA that are in 0 constraint
small modif
Amélioration GUI:
	- se souvient du répertoire quand on choisit plusieurs fichiers à la
suite
	- amélioration affichage résultats
Merge branch 'master' of https://github.com/lmarmiesse/FlexFlux.git

Conflicts:
	src/flexflux/general/Bind.java
Merge branch 'master' of https://github.com/lmarmiesse/FlexFlux.git

Conflicts:
	src/flexflux/unit_tests/data/conditionComparisonTest/conditions.tab
Merge branch 'master' of https://github.com/lmarmiesse/FlexFlux.git
Merge branch 'master' of https://github.com/lmarmiesse/FlexFlux.git
Merge branch 'master' of https://github.com/lmarmiesse/FlexFlux.git
Ajouté que si extmetab = 0, on change lb ou ub de la reac d'échange qui
correspond