Limit the seed option to a non-negative 32 bit integer (Fixed)

[RebelusQuo]

• The settings type is changed from input to seed
• The Reactstrap Input component is styled to hide the number spin buttons since this makes little sense for entering a seed number.
• Each randomizer now also throw an exception on parsing a negative number since while the Random class constructor can take a negative number, its absolute value is used, a behavior that can be non-obvious.

Also switched to using the value prop instead of defaultValue in Configure. The later is meant for "uncontrolled" react components, while the components in question in Configure were used in the "controlled" manner.

Credits to @avvie for identifying the issue

[RebelusQuo]

See issue #50 for rational.