Check to see the given path exists

[Artemid]

Fix for #4 "Check to see file exists"

[Artemid]

Sorry for crappy comment in commit didn't see style before commiting

[Jintin]

Since the test is failed, I think you can modify to pass the test.

1. the indent is tab base in andle.
2. isexist seems not found in some python version. I think you can use os.path.exists as an alternative.
   https://docs.python.org/dev/library/os.path.html#os.path.exists
   Thank you for your help.

[Artemid]

rebuild

[Jintin]

Thank you very much.