Remove unused dependency regexp-quote
Reorder package.json dependencies alphabetically

This is what happens when you do 'npm install module --save', so it
makes sense to do this in a separate commit so future commits don't have
so much noise in them.
Upgrade express to v3.17.5

This is the latest version in the 3.x series and contains deprecation
warnings that should be helpful when upgrading to the 4.x series.
Update dev dependencies
Remove assert dependency

Node already provides this module in core, so it's unnecessary to have
this as a dependency as it's just a mirror of what node provides.
Move glob module into devDependencies

The glob module is only used within the test suite, so there's no need
for it to be in the main dependencies section.
Use app.delete instead of app.del

This fixes a deprecation warning in the latest version of express.
upgrade npm on travis to avoid dependency detection issues

see https://github.com/npm/npm/issues/4984 for details. Without this the
ncp dependency of fs-extra fails to install.