FXLauncher 1.0.13

• Support for fully customizable update UI, see (https://github.com/edvin/fxlauncher-custom-ui)
• Basic Authentication support for manifest url (via https://user:pass@host/path)
• Added --include-extensions as a comma separated list of filename extensions to include of other resources from the build dir. By default it always includes jar,war.
• Fixed bug: If updating from a manifest with no timestamp (pre 1.0.11), new version was considered older, so no upgrade was performed