Starting this from scratch

-) Basic workspace
-) Basic BUILD file with macros
diff --git a/third_party/zlib.BUILD b/third_party/zlib.BUILD
new file mode 100644
index 0000000..323c286
--- /dev/null
+++ b/third_party/zlib.BUILD
@@ -0,0 +1,37 @@
+cc_library(
+  name = "z",
+  linkstatic = 1,
+  srcs = [
+    'adler32.c',
+    'compress.c',
+    'crc32.c',
+    'deflate.c',
+    'infback.c',
+    'inffast.c',
+    'inflate.c',
+    'inftrees.c',
+    'trees.c',
+    'uncompr.c',
+    'zutil.c',
+  ],
+  hdrs = [
+    'crc32.h',
+    'deflate.h',
+    'gzguts.h',
+    'inffast.h',
+    'inffixed.h',
+    'inflate.h',
+    'inftrees.h',
+    'trees.h',
+    'zconf.h',
+    'zlib.h',
+    'zutil.h',
+  ],
+  includes = [
+      'include',
+  ],
+  visibility = [
+    "//visibility:public",
+  ],
+)
+