Fix bootstrap.js always excluded

[SaintPeter]

Added test for filters.uibootstrap === true to exclude bootstrap.js.

Fixes #565

[kingcody]

@SaintPeter thanks, just two things to mention.

This template formatting will output a clean syntax with or without the regexp:

exclude: [<% if(filters.uibootstrap) { %>
  /bootstrap.js/,<% } %>
  '/json3/',

Second, we use grunt-conventional-changelog to generate our CHANGELOG.md. An example of a commit message that would be correctly parsed by that task might look something like this:

fix(wiredep): only exclude bootstrap.js when ui-bootstrap is chosen

If you have any questions about the above format, contributing.md has a pretty good explanation.

[SaintPeter]

ok, would you like me to fix it and re-submit?

[kingcody]

You could --amend your commit and force an update with git push -f. That should be fine.

[kingcody]

In other words, you can overwrite your current commit, then we can just use this PR.

[SaintPeter]

ok, I'll give it a shot.

[kingcody]

https://nathanhoad.net/git-amend-your-last-commit

[SaintPeter]

I made the changes as requested, but I've got a bit of a problem: I am running windows and you have a file named "!yeoman.png", which is not legal on windows. I updated the commit but cannot rebase/squash the old commit because the file shows as modified.

Sorry, that's the best I can do, short of resubmitting.

[kingcody]

@SaintPeter I merged your commit into canary here since this PR was targeting master. Thanks again for you help!

[SaintPeter]

Excellent! Sorry for the trouble.

[kingcody]

No problem at all, I'm always glad to see people contribute (: