remove execute bit from darkfish images

Some PNGs has the execute bit set. Reset the execute bits for
uniformity.
Merge pull request #258 from ktdreyer/darkfish-permissions

remove execute bit from darkfish images
Do not strip regexp literal options [fixes #259]

Ensure that the lexer includes any option, like /foo/i,
when lexing regexp literals.
Correctly handle multiple options

"if is a degenerate while" :D
Merge pull request #265 from reinh/include-regexp-literal-options

Do not strip regexp literal options [fixes #259]
Update History for #259, #265
Remove trailing whitespace
Remove trailing whitespace