plusplus - a fairly sophisticated point manager

*name++
*name--
*/top 10
*/bottom 10
*/score name
*Does spam checking (so the same person can't vote on the same thing within 30 seconds)
*prints out scores with clark

Sample output:

```
Hubot> github++
Hubot> github has 1 points.
Hubot> sourceforge--
Hubot> sourceforge has -1 points.
Hubot> sourceforge--
Hubot> spam protected :(
Hubot> coffee++
Hubot> coffee has 1 points.
Hubot> github++
Hubot> github has 2 points.
Hubot> hubot top 5
Hubot> 
▇▅▃▁
1. github : 2
2. coffee : 1
3. test : 0
4. sourceforge : -1

```