This mostly fixes spelling, and there are some grammer updates.

I used Hinton's spelling for RBM <http://www.cs.toronto.edu/~hinton/>.  

Plural acronyms like RBMs do not have an apostrophe according to https://english.stackexchange.com/questions/503/what-is-the-correct-way-to-pluralize-an-acronym

MATLAB is all caps according to http://www.mathworks.com/products/matlab/