Adds a lumberborne mod tag to the logger so if multiple mods are logging
to the same file, they can be differentiated from each other.

Fixes a problem where the install instructions only worked for users
with the username 'hawarth'.

Cleans the ~/.local/share/Bay\ 12\ Games/Dwarf\
Fortress/data/installed_mods/ directory so the game can properly refresh
the newly built/installed mod; otherwise the game will not register the
changes.

Updates the description to reflect the mod a bit better.

Updates .gitignore to ignore some more files and directories generated
by the Makefile.

Adds a basic Makefile that lets us package the mod into a directory ready
to be loaded into Dwarf Fortress with the install recipe.

Also lets us create a zip and tarball and has a clean recipe to remove
files generated by the Makefile.

Moves the log function from init.lua to logger.lua and then requires
logger.lua in init.lua.

Initialises the project with an info.txt and init.lua, so that the mod
is picked up in Dwarf Fortress.