Fix spelling and formatting in README [skip ci]

* Add link to `examples` directory
* Convert text to complete sentences for readability
* Separate bash and Python code for better understanding
* Add Python syntax highlighting
* Add explicit instructions to help users get started easier

README.md

@@ -5,26 +5,32 @@ Latex code for drawing neural networks for reports and presentation. Have a look
 
 ## TODO
 
-- [X] Python interfaz
+- [X] Python interface
 - [ ] Add easy legend functionality
 - [ ] Add more layer shapes like TruncatedPyramid, 2DSheet etc
 - [ ] Add examples for RNN and likes.
 
-## Latex Usage
-    see examples
+## Latex usage
 
-## PyUsage
+See [`examples`](examples) directory for usage.
 
-    mkdir my_project
-    cd my_project
+## Python usage
+
+First, create a new directory and a new Python file:
+
+    $ mkdir my_project
+    $ cd my_project
     vim my_arch.py
 
-        import sys
-        sys.path.append('../')
-        from pycore.tikzeng import *
+Add the following code to your new file:
 
-        # defined your arch
-        arch = [
+```python
+import sys
+sys.path.append('../')
+from pycore.tikzeng import *
+
+# defined your arch
+arch = [
     to_head( '..' ),
     to_cor(),
     to_begin(),
@@ -38,12 +44,15 @@ Latex code for drawing neural networks for reports and presentation. Have a look
     to_end()
     ]
 
-        def main():
+def main():
     namefile = str(sys.argv[0]).split('.')[0]
     to_generate(arch, namefile + '.tex' )
 
-        if __name__ == '__main__':
+if __name__ == '__main__':
     main()
+```
+
+Now, run the program as follows:
 
     bash ../tikzmake.sh my_arch