Implement first iteration of parser and write test scripts

scripts/build.sh

@@ -7,5 +7,11 @@ CFLAGS="$CFLAGS -O0 -ggdb"
 mkdir -p build
 
 # Build library
+clang $CFLAGS -Ilib -c lib/parser.c -o build/parser.o
 clang $CFLAGS -Ilib -c lib/regex.c -o build/regex.o
-ar -crs build/lib.a build/regex.o
+ar -crs build/lib.a build/parser.o build/regex.o
+
+# Build tests
+clang $CFLAGS -Itests -c tests/testing.c -o build/testing.o
+clang $CFLAGS -Ilib -Itests -o build/parser_tests \
+	  tests/parser_tests.c build/testing.o build/lib.a