Update example with extra_pip_args, pip_data_exclude and quite options (#49)

example/WORKSPACE

diff --git a/example/WORKSPACE b/example/WORKSPACE
index 4baff5a..f42f7c5 100644
--- a/example/WORKSPACE
+++ b/example/WORKSPACE
@@ -62,12 +62,24 @@
 load("@rules_python_external//:defs.bzl", "pip_install")
 
 pip_install(
-    # You can optionally provide a python_interpreter (path) or a python_interpreter_target (a Bazel target, that
+    # (Optional) You can provide extra parameters to pip.
+    # Here, make pip output verbose (this is usable with `quiet = False`).
+    #extra_pip_args = ["-v"],
+
+    # (Optional) You can exclude custom elements in the data section of the generated BUILD files for pip packages.
+    # Exclude directories with spaces in their names in this example (avoids build errors if there are such directories).
+    #pip_data_exclude = ["**/* */**"],
+
+    # (Optional) You can provide a python_interpreter (path) or a python_interpreter_target (a Bazel target, that
     # acts as an executable). The latter can be anything that could be used as Python interpreter. E.g.:
     # 1. Python interpreter that you compile in the build file (as above in @python_interpreter).
     # 2. Pre-compiled python interpreter included with http_archive
     # 3. Wrapper script, like in the autodetecting python toolchain.
     python_interpreter_target = "@python_interpreter//:python_bin",
+
+    # (Optional) You can set quiet to False if you want to see pip output.
+    #quiet = False,
+
     # Uses the default repository name "pip"
     requirements = "//:requirements.txt",
 )