General refactor

[4gus71n]

• Using a regex to replace all unicode characters in the getContentWithoutUnicode method.
• Reusing the getContent method in the getContentWithoutUnicode instead of doing it all over.
• Made one liner in the saveContent method. Also I'm using the PrintStream instead of the plain FileOutputStream.
• I got rid of every char per char reading and writing, isn't efficent at all.