updated pom, optimized code for java 11

.gitignore

pom.xml

...earprogrammingfullsimplex/CanonicalProgramParameters.java

...linearprogrammingfullsimplex/CanonicalSimplexProgram.java

...earprogrammingfullsimplex/LinearProgrammingICYPlugin.java

...nchenouard/linearprogrammingfullsimplex/SimplexBLAND.java

...chenouard/linearprogrammingfullsimplex/SimplexLEXICO.java

...s/nchenouard/linearprogrammingfullsimplex/SimplexMAX.java

...inearprogrammingfullsimplex/TableauMinSlackObjective.java

...nearprogrammingfullsimplex/TableauWithSlackVariables.java