DOC: Corrected some typos.

docs/source/beginner-tutorial.rst

@@ -575,7 +575,7 @@ minute-level data when using ``1m``). This is a function we use in the
 
 You will note that the code below is substantially longer than the previous 
 examples. Don't get overwhelmed by it as the logic is fairly simple and easy to 
-follow. Most of the added some complexity has been added to beautify the output, 
+follow. Most of the added complexity has been added to beautify the output, 
 which you can skim through for now. A copy of this algorithm is available in 
 the ``examples`` directory:
 `dual_moving_average.py <https://github.com/enigmampc/catalyst/blob/master/catalyst/examples/dual_moving_average.py>`_.

docs/source/development-guidelines.rst

@@ -47,8 +47,8 @@ Finally, you can build the C extensions by running:
 Development with Docker
 -----------------------
 
-If you want to work with zipline using a `Docker`__ container, you'll need to 
-build the ``Dockerfile`` in the Zipline root directory, and then build 
+If you want to work with Catalyst using a `Docker`__ container, you'll need to 
+build the ``Dockerfile`` in the Catalyst root directory, and then build 
 ``Dockerfile-dev``. Instructions for building both containers can be found in 
 ``Dockerfile`` and ``Dockerfile-dev``, respectively.
 

docs/source/install.rst

@@ -59,7 +59,7 @@ main packages needed. To install MiniConda, you can follow these steps:
   For Windows, if you accepted the default installation options, you didn't 
   check an option to add Conda to the PATH, so trying to run ``conda`` from
   a regular ``Command Prompt`` will result in the following error: ``'conda' 
-  is no recognized as an internal or external command, operatble program or 
+  is not recognized as an internal or external command, operable program or 
   batch file``. That's to be expected. You will nee to launch an ``Anaconda 
   Prompt`` that was added at installation time to your list of programs 
   available from the Start menu.