Reorganize project structure: move modules to neopig/, scripts to scripts/, data to data/

Makefile

@@ -12,7 +12,7 @@ install: venv
 	$(PIP) install -r requirements.txt
 
 test: install
-	$(PYTHON) test_crawl.py
+	$(PYTHON) -m pytest tests/ -v --tb=short
 
 crawl: install
 	$(PYTHON) neopig.py $(ARGS)
@@ -21,8 +21,8 @@ archive: install
 	$(PYTHON) archive.py $(ARGS)
 
 # Build bootstrap binary for self-extracting archives
-bootstrap: bootstrap.c
-	gcc -O2 -Wall -o bootstrap bootstrap.c -lz
+bootstrap: scripts/bootstrap.c
+	gcc -O2 -Wall -o bootstrap scripts/bootstrap.c -lz
 	@echo "Built: bootstrap ($$(stat -c%s bootstrap 2>/dev/null || stat -f%z bootstrap) bytes)"
 
 # Create self-extracting .run from a tarball