please consider upgrading to q-io@2

[gordonwoodhull]

Please excuse my inexperience with npm dependencies; I may be overlooking a simple solution here.

I've been tracking down a crash in the dc.js docs build: dc-js/dc.js#1142

I filed an issue on grunt-jsdoc-to-markdown: jsdoc2md/grunt-jsdoc-to-markdown#8

The issue wasn't there, but @75lb was kind enough to track down the problem to montage/collections overriding Array.prototype.find wrong, which can break any other grunt modules at random: montagejs/collections#139

montage/collections is included in grunt-gh-pages via q-io.

In this issue @kriskowal notes that q-io@2 uses collections@2, which does not have this problem: kriskowal/q-io#131

I have not done extensive testing, but installing q-io@2 into node_modules/grunt-gh-pages fixes my build and grunt-gh-pages seems happy with it.

[gordonwoodhull]

Thanks for merging #62, @tschaub!

I've verified this fixes the build problems we were having.