included dictionary for use in MLP()
Revert "included dictionary for use in MLP()"

This reverts commit 50af1beb4919dca1c5f4c6ee362ba2170a7515ce.
included activation function dictionary
updated example.jl to reflect new definition of MLP
updated MLP to figure out the actd vector for itself
Merge branch 'auto_activd'
made comments neater