Fix markdown link syntax and small context revision

Author: SanMuHe

python/python-project-structure.md

@@ -1,6 +1,6 @@
 # Python Project Structure
 
-I prefer the below structure recommened by (Kenneth Reitz)[http://www.kennethreitz.org/] at (GitHub)[https://github.com/kennethreitz/samplemod].
+I prefer the below structure recommened by [Kenneth Reitz](http://www.kennethreitz.org/] at (GitHub)[https://github.com/kennethreitz/samplemod). For explanation for each piece, please refer to [here](http://www.kennethreitz.org/essays/repository-structure-and-python).
 
 ```
 README.rst
@@ -16,4 +16,3 @@ tests/test_basic.py
 tests/test_advanced.py
 ```
 
-For explanation for each piece, please refer to (here)[http://www.kennethreitz.org/essays/repository-structure-and-python].