Handle vim versions lacking gettabvar().
Refactor hunk functionality.
Move logic out of main plugin file.
Add hunk previewing.
Optimise removal of all signs where possible.
Use bg values from SignColumn for GitGutter{Add,Change,Delete}Default
Follow linked highlight groups to find background colors
When disabling, disable across all buffers.
README: adapt to Vundle interface change

"Bundle" is now "Plugin"

https://github.com/gmarik/Vundle.vim/blob/master/doc/vundle.txt#L345-L369
Update broken link to my portfolio.
Fix typo in function definition.
Rename function for clarity.
Fix independent toggling of signs in sign column and line highlights.

Note that line highlighting requires signs to be placed (because the
line highlight is simply an attribute of a sign).  If the user doesn't
want to see signs in the sign column, but does want line highlighting,
then we make the signs in the sign column invisible.

If neither the signs in the sign column nor the line highlights are
needed (presumably the user just looks at the hunks stats) then we can
remove all signs, at which point Vim removes the sign column...unless
the "sign column always" option is set.
Document the sign column's presence with line highlights.
Use proper regex when fetching SignColumn colors.

The previous regex would incorrectly match null characters in some cases.
Show sign on first line when line(s) deleted at start of file.
Revert "Show sign on first line when line(s) deleted at start of file."

Signs aren't shown for deleted lines which aren't at the start of the
file.

This reverts commit 0fd18d66f6f1faf75b6c638d6d7469a4aed3be47.
Show sign on first line when line(s) deleted at start of file.

This time with silly mistake fixed.
Fix bug where custom highlights were lost.
Specify UTF-8 to avoid problems with overscore character.