fix: typos in cmds; upd: warning about ceasing support for python2

README.md

@@ -25,7 +25,7 @@ If you use DLTK in your work please refer to this citation for the current versi
 If you use any application from the [DLTK Model Zoo](https://github.com/DLTK/models), additionally refer to the respective README.md files in the applications' folder to comply with its authors' instructions on referencing.
 
 ### Installation
-1. Setup a virtual environment and activate it. Although DLTK<=0.2.1 supports and python 2.7, we will not support it future releases, similarly to our dependencies (i.e. SciPy, NumPy). We highly recommend using ptyhon3. If you intend to run this on machines with different system versions, use the --always-copy flag:
+1. Setup a virtual environment and activate it. Although DLTK<=0.2.1 supports and python 2.7, we will not support it future releases, similarly to our dependencies (i.e. SciPy, NumPy). We highly recommend using python3. If you intend to run this on machines with different system versions, use the --always-copy flag:
 
    ```shell
    virtualenv -p python3 --always-copy venv_tf