fix versioning better

.bumpversion.cfg

 [bumpversion]
-current_version = 0.4.0-rc4
+current_version = 0.4.0rc4
 commit = False
 tag = False
-parse = (?P<major>\d+).(?P<minor>\d+).(?P<patch>\d+)(-(?P<prerel>[abc]|rc|dev)(?P<prerelversion>\d+))?
-serialize = 
-	{major}.{minor}.{patch}-{prerel}{prerelversion}
-	{major}.{minor}.{patch}-{prerel}
+parse = (?P<major>\d+).(?P<minor>\d+).(?P<patch>\d+)((?P<prerel>[abc]|rc|dev)(?P<prerelversion>\d+))?
+serialize =
+	{major}.{minor}.{patch}{prerel}{prerelversion}
+	{major}.{minor}.{patch}{prerel}
 	{major}.{minor}.{patch}
 
 [bumpversion:file:VERSION]
@@ -14,7 +14,7 @@ serialize =
 
 [bumpversion:part:prerel]
 optional_value = d
-values = 
+values =
 	dev
 	a
 	b

VERSION

-0.4.0-rc4
\ No newline at end of file
+0.4.0rc4
\ No newline at end of file

setup.py

@@ -11,8 +11,6 @@ import os
 
 from setuptools import setup, find_packages, findall
 from setuptools.command.install import install
-import pkg_resources
-pkg_resources.extern.packaging.version.Version = pkg_resources.SetuptoolsLegacyVersion
 
 class TowerInstall(install):
     """

tower/ui/desktop_ui.js

@@ -55,7 +55,7 @@ var desktop = {
                                 {
                                     id: "version",
                                     icon: "info",
-                                    value: "Version: 0.4.0-rc4"
+                                    value: "Version: 0.4.0rc4"
                                 }
                             ]
                         }