Add func IgnoreDotFiles and make it the default function. This function will ignore all files that start with a "." when uploading files and directories. Also exported the NeverIgnore function in case we ever want to setup an upload that never ignores files.
Add func IgnoreDotFiles and make it the default function. This function will ignore all files that start with a "." when uploading files and directories. Also exported the NeverIgnore function in case we ever want to setup an upload that never ignores files.

materials-commons/mcstore,materials-commons/mcstore,materials-commons/mcstore