Merge pull request #79 from calder/master

Support "+" in package versions.

rules_python/whl.py

diff --git a/rules_python/whl.py b/rules_python/whl.py
index e3544d8..3e9d4f8 100644
--- a/rules_python/whl.py
+++ b/rules_python/whl.py
@@ -46,7 +46,7 @@
     # Returns the canonical name of the Bazel repository for this package.
     canonical = 'pypi__{}_{}'.format(self.distribution(), self.version())
     # Escape any illegal characters with underscore.
-    return re.sub('[-.]', '_', canonical)
+    return re.sub('[-.+]', '_', canonical)
 
   def _dist_info(self):
     # Return the name of the dist-info directory within the .whl file.

tools/piptool.par

diff --git a/tools/piptool.par b/tools/piptool.par
index b7a62c5..b105fd4 100755
--- a/tools/piptool.par
+++ b/tools/piptool.par
Binary files differ

tools/whltool.par

diff --git a/tools/whltool.par b/tools/whltool.par
index 8e2f342..cab1f7d 100755
--- a/tools/whltool.par
+++ b/tools/whltool.par
Binary files differ