Better support for binary files in 'hit status'

[chshersh]

I've just discovered that binary files are rendered differently in the git diff --stat command:

 .foo.un~  | Bin 0 -> 523 bytes
 README.md |   4 ++++
 foo       |   1 +

This breaks hit status command because it assumes that every line is:

<filename> | <n> <pluses-and-minuses>

Looks like parsing should be more flexible.