Fix docs issue (apache#59)

Author: tqchen

nnvm/docs/how_to/install.md

@@ -49,10 +49,10 @@ There are several ways to install the package:
     export PYTHONPATH=/path/to/nnvm/python:${PYTHONPATH}
     ```
 
-2. Install tvm python bindings by `setup.py`:
+2. Install nnvm python bindings by `setup.py`:
 
     ```bash
-    # install tvm package for the current user
+    # install nnvm package for the current user
     # NOTE: if you installed python via homebrew, --user is not needed during installaiton
     #       it will be automatically installed to your user directory.
     #       providing --user flag may trigger error during installation in such case.

nnvm/docs/top.rst

@@ -1,7 +1,7 @@
 Core Tensor Operators
 =====================
 
-This page contains the list of core tensor operator primitives re-defined in NNVM.
+This page contains the list of core tensor operator primitives pre-defined in NNVM.
 The core tensor operator primitives(``nnvm.top``) covers typical workloads in deep learning.
 They can represent workloads in front-end frameworks, and provide basic building blocks for optimization.
 Since deep learning is a fast evolving field and it is that possible to have operators that are not in here.