Add support for custom params in Custom Validators

[franleplant]

This fixes #4 and starts to lay the foundation for a better Documentation with a better formatting et al.

[coveralls]

Coverage increased (+0.03%) to 83.984% when pulling 5facc84 on validator-params into 658376d on master.

[coveralls]

Coverage increased (+0.03%) to 83.984% when pulling d991126 on validator-params into 658376d on master.

[coveralls]

Coverage increased (+0.03%) to 83.984% when pulling 3b49ff2 on validator-params into 658376d on master.

[coveralls]

Coverage increased (+0.03%) to 83.984% when pulling 3b49ff2 on validator-params into 658376d on master.

[coveralls]

Coverage increased (+0.03%) to 83.984% when pulling aae2785 on validator-params into 658376d on master.

[coveralls]

Coverage increased (+0.03%) to 83.984% when pulling 6955cd5 on validator-params into 658376d on master.

[coveralls]

Coverage increased (+0.03%) to 83.984% when pulling e92c736 on validator-params into 658376d on master.

[coveralls]

Coverage increased (+0.03%) to 83.984% when pulling 24be596 on validator-params into 658376d on master.

[coveralls]

Coverage increased (+0.03%) to 83.984% when pulling fd11700 on validator-params into 658376d on master.

[franleplant]

This looks fine! Im merging