Rename Role Based Bounties.md to RoleBasedBounties.md

the link is breaking on mastercoinfoundation.org, I think it is due to the white space in the file name

https://github.com/mastercoin-MSC/spec/blob/master/Role%2520Based%2520Bounties.md
Merge pull request #9 from zynis/patch-1

Rename Role Based Bounties.md to RoleBasedBounties.md