upgrade to 1.4.0 (#114)

Author: rabitt

README.md

@@ -64,14 +64,6 @@ pytest
 
 # Examples
 
-**Warning: These examples use the most recent pre-release of pysox (1.4.0b0). You can install it with:**
-
-
-```pip install sox --pre```
-
-
-**For examples and documentation for other versions, see the [Documentation](http://pysox.readthedocs.org).**
-
 ```python
 import sox
 # create transformer

sox/version.py

@@ -3,4 +3,4 @@
 """Version info"""
 
 short_version = '1.4'
-version = '1.4.0b0'
+version = '1.4.0'