Add a binding for the silence package.

Fix last remaining warning emitted by pdflatex.

Invoke pdflatex through latexrun.

latexrun is a script that tidies up the output of pdflatex in such a way
that it looks similar to GCC/Clang. (Almost?) all unnecessary output is
removed. Instead of suppressing the output on success, now use the
occasion to simply print the output of this command, so the user has
useful warnings to act on.

Unfortunately, the stock version of latexrun required a minor change to
work properly. It seems to crash by default if pdflatex invokes mktexfmt
as well. Fix this by using non-greedy pattern matching. Also improve the
output a bit by using relative paths.

Fixes: ProdriveTechnologies#3

Also document what is not supported.

Add a proper license.

Use external prefixed targets where necessary.

This makes bazel-latex work again when used externally.

Remove outdated info.

Run pdflatex until we reach a fixed point.

It looks like running pdflatex twice is not sufficient to get line
numbers in documents working properly. Simply run up to ten times,
terminating if two runs yield the same document.

Remove the bazel-out/*/genfiles/ prefix if present.

This allows seamless inclusion of files generated by other targets.

Run the document viewer in the background.