Weight initialization

The tool now has an extra option (initialize_uniform_weights).
If set to w!=0, then the nn weights are set within a uniform
(-w,w). Otherwise, it uses default hardwired weight initialization.

initialize_uniform_weights is set to 0.05, per bbn paper.
Fix indentation
Initialize static weights for safety
Changes to address Juan's comments
Set uniform weight parameter to 0.0F, so default hardwired normal
distribution is used.

Also, empty lines etc.
Merge pull request #3 from jmp84/nnjm-initialize-weights

Weight initialization