Added throwAssertion() matcher documentation to readme
Added throwAssertion() matcher documentation to readme

dgdosen/Nimble,dgdosen/Nimble,jeffh/Nimble,twobitlabs/Nimble,DanielAsher/Nimble,DanielAsher/Nimble,DanielAsher/Nimble,jeffh/Nimble,AnthonyMDev/Nimble,Quick/Nimble,abbeycode/Nimble,phatblat/Nimble,jeffh/Nimble,abbeycode/Nimble,phatblat/Nimble,Quick/Nimble,abbeycode/Nimble,twobitlabs/Nimble,dgdosen/Nimble,jeffh/Nimble,dgdosen/Nimble,AnthonyMDev/Nimble,Quick/Nimble,AnthonyMDev/Nimble,phatblat/Nimble,abbeycode/Nimble,twobitlabs/Nimble