added log and ln

added exponential support

fixed numbertoken issue to allow for .xxx and 0.xxx

small change

trying to fix pTwo add on function

added absolute value function

Merge branch 'master' of https://github.com/zRosenthal/math-executor

work

Update README.md

added function to handle AB_P02

fixed composer autoload

small change in composer

readme change

changed namespace

init commit, extended math-executor to work for specific implementation, fixed a few small bugs and added atan2