updated README to be consistent with the project

Author: varunagrawal

README.md

@@ -1,17 +1,26 @@
 # gtsam-project-python
+
 Project template using GTSAM + python wrapping
 
+## PREREQUISITES
+
+- Python 3.6+ is required, since we support these versions.
+- Make the following changes to `GTSAM`:
+
+  - Set the CMake flag `GTSAM_INSTALL_CYTHON_TOOLBOX` to `ON` to enable building the cython wrapper.
+  - Set the CMake flag `GTSAM_PYTHON_VERSION` to `3`, otherwise the default interpreter will be used.
+  - You can do this on the command line as follows:
+
+    ```sh
+    cmake -GTSAM_INSTALL_CYTHON_TOOLBOX=ON -DGTSAM_PYTHON_VERSION=3 ..
+    ```
+
+## INSTALL
 
-INSTALL
-=======
-- Python3 is required
-- Make the following changes before build and install:
-    - Set the CMake flag `GTSAM_INSTALL_CYTHON_TOOLBOX=ON` to enable building the cython wrapper.
-    - Set the CMake flag `-DGTSAM_PYTHON_VERSION=3`, otherwise the default interpreter will be used.
-- Run `cmake ..`
-- Run `make install` (may need use sudo), and the wrapped module will be installed to `GTSAM_CYTHON_INSTALL_PATH`, which is
-by default: `<your CMAKE_INSTALL_PREFIX>/cython`
-- After building and installing gtsam, navigate to `GTSAM_CYTHON_INSTALL_PATH` and run `python setup.py install`
+- In the `example` directory, create the `build` directory and `cd` into it.
+- Run `cmake ..`.
+- Run `make`, and the wrapped module will be installed to a `cython` directory.
+- Navigate to the `cython` directory and run `python setup.py install`.
 
-For more detailed information, please see 
-https://github.com/borglab/gtsam/tree/develop/cython
+For more detailed information, please see
+[this link](https://github.com/borglab/gtsam/tree/develop/cython)