Add Ruby implementation of hashing samples with single hash calculation.
Add comparison code for two text samples
Add Ruby script for simple mining simulator
Add function to solve blocks using target limit to Ruby mining script.
Add Slop parsing code to Ruby mining script.
Fix mining script.
Implement command-line parsing for mining script.
Implement generic block solving method and target setters.
Remove commented-out code from mining script.
Update automatic parameter setting.
Merge branch 'master' into hashing-ruby
Merge branch 'hashing-ruby'