Placed reading Iris script in a better location

The ols parseIris script was renamed to readIris and placed in a new
location that seems to make more sense.
Renamed function
Added linear regression implementation

The implementation of the hypothesis (linRegHyp) and the cost function
(linRegCost) were added to the code base. Theese functions are intended
to work with optimization functions such as fminunc.
Added the UCI Iris Data Set
Removed utility function

I have changed from the old Matlab version I vas using to a recent
version of Octave.

The strsplit function is provided in the Octave version I'm currently
using. It is not required.
Added a function to split a data set