Uppercasing first character in exception message in `Library` command.
Uppercasing first character in exception message in `Library` command.

mehlah/lithium,qoqa/lithium,SensCritique/lithium,m4rcsch/lithium-core-library,datachand/lithium,datachand/lithium,graphis/lithium,whowgames/lithium,jails/lithium,qoqa/lithium,m4rcsch/li3_framework,davidpersson/lithium,whowgames/lithium,mehlah/lithium,pixelcog/lithium,muyehub/lithium,wbeater/lithium,muyehub/lithium,jails/lithium,davidpersson/lithium,UnionOfRAD/framework,m4rcsch/lithium-core-library,UnionOfRAD/lithium,SensCritique/lithium,UnionOfRAD/lithium,pixelcog/lithium,wbeater/lithium,graphis/lithium