Make reqsort its own thing

projects/reqsort/BUILD

@@ -0,0 +1,7 @@
+py_binary(
+    name = "reqsort",
+    main = "__main__.py",
+    deps = [
+        py_requirement("click"),
+    ]
+)

projects/reqsort/README.md

@@ -0,0 +1,3 @@
+# reqsort
+
+A `requirements.txt` formatter and sorter.

projects/reqsort/__main__.py

@@ -6,6 +6,7 @@ import re
 
 import click
 
+
 REQ_PATTERN = re.compile(
     r"(?P<pkgname>[a-zA-Z0-9_-]+)(?P<features>\[.*?\])?==(?P<version>[^\s;#]+)|(.*?#egg=(?P<eggname>[a-zA-Z0-9_-]+))"
 )