Safeio

[fix]
- Fixing a problem with reading JSONFile()
- Set indent in JSONFile to None if None

First Release

Feature
- TextFile
- JSONFile
- BinaryFile
- Safe I/O
- "with" statement --> deletes the file after using it
- iteration through document's lines (for loop)
- Similarity with substraction (obj - obj)
- Equality with ==
- Inequality with !=
- Delete the file
- Move the file
- Rename the file
- File IO-like object