misc.Gain(s): added inputType2sumblk() to ease creation of sumblk() with the Control Systems Toolbox, be creating a string [inputType(1) + inputType(2) + ... inputType(end)]

- moved finiteDifferenceStencilBoundary to numeric.fd.stencilBoundary
- added numeric.fd.matrix: implemented five point central finite differences scheme for 1st and 2nd order derivatives
- unittests for both

numeric.finiteDifferenceStencilBoundary.m new function to calculate finite difference approximations at boundaries

quantity.example: comments

quantity.example: add illustrative example for scalars and a volterra integral of 2nd kind for 2x2 kernels

new: misc.getfield for hierarchical structs, example: myStruct.topLevel.lowerLevel.data == misc.getfield(myStruct, 'topLevel.lowerLevel.data')

misc.Parser: added dependend property UnmatchedNameValuePair (helpful for inserting remaining inputs to a method called within the current method)