Merge pull request #39 from ipython/Carreau-patch-1

remove --pre

Author: minrk

README.md

@@ -6,9 +6,6 @@ This package provides the IPython kernel for Jupyter.
 
 1. `git clone`
 2. `cd ipykernel`
-3. `pip install --pre -e .`
-
- 
-The `--pre` will only be needed while we haven't released IPython 4. Once that's done, it will never be needed again. `--pre` isn't needed if you already have IPython from master.
+3. `pip install -e .`
 
 After that, all normal `ipython` commands will use this newly-installed version of the kernel.