Release v0.10.4

Fixes:

• Now correctly overwrites parts of maps. See issue #29
• Now only filters packages after includes have been processed, so that packages in included.toml that don't appear in local.toml's packages variable don't cause an error anymore

New Features:

• dotter diff - read more on the wiki
• dotter watch diff - runs dotter diff whenever a file changes, read more on the wiki