Added the ability to add a backslash.
Added the ability to add a backslash.

Previously it was impossible to have a backslash be the last character in the string, because that would be an escaped apostrophe. Now, backslashes must be escaped, but it is possible to put a literal backslash anywhere in the string.

sk89q/CommandHelper,KamranMackey/CommandHelper,dbuxo/CommandHelper,sk89q/CommandHelper,Techcable/CommandHelper,sk89q/CommandHelper,dbuxo/CommandHelper,Techcable/CommandHelper,dbuxo/CommandHelper,dbuxo/CommandHelper,KamranMackey/CommandHelper,sk89q/CommandHelper,Techcable/CommandHelper,Techcable/CommandHelper,KamranMackey/CommandHelper