Ingest

Initial working version of ingestion. Originally put in another repo but recreated here since this is where the code will be hosted from now on. In order for this PR to work though, I had to manually copy things over which lost the old commit history though luckily there wasn't that much.

Makefile

+
+build:
+	cargo build
+
+lint:
+	cargo fmt --check
+	cargo clippy -- -D warnings
+
+docs:
+	cargo doc --open --lib --no-deps
+
+cli-docs:
+	cargo doc --open --bin=cli --no-deps
+
+dummy-data:
+	cd cli && \
+	cargo run -- solr-ingest --data-dir ../.docker/data
+
+# sadly necessary to get this compiling for Linux on Mac thanks to openssl
+# TODO: figure out if a local install of openssl on Mac can make this work
+docker-build:
+	docker run \
+	-v $(PWD):/workspace \
+	-w /workspace \
+	rust:latest \
+	cargo build --release