added a check for global optim toolbox,

updated links to other deps

fixed a bug in Axial synapses

fixed #563

minor fix to json file

Merge pull request #547 from sg-s/no-getfullstatesize

No getfullstatesize

minor bugfix to conductance

ready to make new release

fixed #535

uses regex to convert a^b -> pow(a,b)

docs now list required MATLAB toolboxes

fixed a bug where multiple C++ compilers threw an error