add consistency, fix display of times, update readme, show final results time

[finalcut]

I made some changes to your fork so figured I'd offer them back to you.

I renamed your new argument of write_weights_file to writeWeightFile to match the orginal authors style for aguments.

Some other changes:

• fixed time formatting
• improved time computation for each thread
• defaulted threads to 4 instead of 2
• updated readme documentation
• fixed width of results table to be more readable
• added new change to show total time across all threads (stolen and modified PR waiting on OP repo)

Hope you can find some use in them.