Interdimensional 1.1.0

Changes:

- Added support for colour specification when creating a portal
- Added client mod for tinting portals when specified on the server, while showing vanilla portals to clients without the mod
- Added GUI for world creation/customisation and deletion
- Added proper support for portal deletion from internal registry
- Removed create, delete and generator command interfaces, replacing them with commands for opening the GUI
- Updated Polymer
- Updated to 1.18.1
- Removed illegal BlockStates