Rewrite it as reStructuredText so that it can be hosted alongside the
API documentation on Read The Docs, which allows linking to WIP syntax
documentation.
The readme now informs users that the MSVC 2015 x86 redistributable
is required, and the installer will download and install it if it
is not detected as being already installed.
If the installer is run and LOOT is already installed, it will use the
existing directory by default. Before this commit, it would not give the
user the option to change this default, so if the drive no longer
existed an error would occur. Fixes#591.
The installer only installs a settings file so that it can set LOOT's
language to that chosen for the installer. However, as of
6307a3c194 LOOT can load partial settings
files, so the installer just needs to write out the language string to a
new settings file if one is not already present. This then means the
repository's settings.yaml can be removed.
Closes#527.