diff --git a/CHANGES b/CHANGES
index 38fcbf7..1ed61e8 100644
--- a/CHANGES
+++ b/CHANGES
@@ -2,7 +2,13 @@ Lantz Changelog
 ===============
 
 
-0.3 (unreleased)
+0.4 (unreleased)
+----------------
+
+- Nothing changed yet.
+
+
+0.3 (2015-02-05)
 ----------------
 
 - Introduced MessageBasedDriver, a class to rule them all.
diff --git a/MANIFEST.in b/MANIFEST.in
index cdb4481..fae4715 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,10 +1,16 @@
 include LICENSE AUTHORS README CHANGES
-recursive-include tests *
+recursive-include lantz/testsuite *
 recursive-include examples *
 recursive-include docs *
 recursive-include lantz/drivers *
 recursive-include lantz/simulators *
 recursive-include lantz/ui *
+
+include *.txt
+include .travis.yml
+recursive-include lantz *.c
+recursive-include lantz *.h
+
 global-exclude *.pyc *.pyo .DS_Store
 prune docs/_build
 prune docs/_themes/.git
diff --git a/lantz/drivers/legacy/visa.py b/lantz/drivers/legacy/visa.py
index d59cf74..6bcd75d 100644
--- a/lantz/drivers/legacy/visa.py
+++ b/lantz/drivers/legacy/visa.py
@@ -35,7 +35,10 @@ class VisaDriver(object):
 
     def __new__(cls, resource_name, *args, **kwargs):
         library_path = kwargs.get('library_path', None)
-        manager = visa.ResourceManager(library_path)
+        if library_path:
+            manager = visa.ResourceManager(library_path)
+        else:
+            manager = visa.ResourceManager()
         name = manager.resource_info(resource_name).resource_name
         if name.startswith('GPIB'):
             return GPIBVisaDriver(resource_name, *args, **kwargs)
@@ -69,7 +72,10 @@ def __init__(self, resource_name, *args, **kwargs):
         self._init_attributes = {}
 
         library_path = kwargs.get('library_path', None)
-        self.resource_manager = visa.ResourceManager(library_path)
+        if library_path:
+            self.resource_manager = visa.ResourceManager(library_path)
+        else:
+            self.resource_manager = visa.ResourceManager()
 
         self.resource = None
 
diff --git a/setup.py b/setup.py
index f5daa5a..2091f50 100644
--- a/setup.py
+++ b/setup.py
@@ -47,7 +47,7 @@ def read(filename):
 
 
 setup(name='Lantz',
-      version='0.3.dev2',
+      version='0.4.dev0',
       license='BSD',
       description='Instrumentation framework',
       long_description=long_description,
@@ -70,10 +70,6 @@ def read(filename):
                        ] + requirements,
       zip_safe=False,
       platforms='any',
-      extra_require={'colorama':  ['colorama'],
-                     'numpy': ['numpy'],
-                     'ui': ['sip', 'pyqt4']
-                    },
       entry_points={
            'zest.releaser.releaser.after_checkout': [
               'pyroma = lantz:run_pyroma',
diff --git a/tox.ini b/tox.ini
deleted file mode 100644
index 967b38f..0000000
--- a/tox.ini
+++ /dev/null
@@ -1,8 +0,0 @@
-[tox]
-envlist = py32,py33
-
-[testenv]
-commands = {envpython} -m unittest discover
-deps = 
-    pint
-    stringparser