Fix character encoding problems

[ghost]

Issue 188:
Error: 'ascii' codec can't decode byte 0xe7 in position 0: ordinal not in range(128)

[adamzap]

Could you provide an input file that exhibits #188?

[ghost]

OS: Windows 7
Python Version: python 2.7.8
Landslide version: 1.1.3
Test filename: 我的测试文件.md

# Landslide

---

# Overview

Generate HTML5 slideshows from markdown, ReST, or textile.

![python](http://i.imgur.com/bc2xk.png)

Landslide is primarily written in Python, but it's themes use:

- HTML5
- Javascript
- CSS

---

# Code Sample

Landslide supports code snippets

    !python
    def log(self, message, level='notice'):
        if self.logger and not callable(self.logger):
            raise ValueError(u"Invalid logger set, must be a callable")

        if self.verbose and self.logger:
            self.logger(message, level)

When input the command landslide.exe ./我的测试文件.md in the CMD will occur the following error:

Error: 'ascii' codec can't decode byte 0xb2 in position 2: ordinal not in range(128)