gitignore: add .idea, *.tgz, *.iml
package: update devDependencies

 - loopback 1.x to ^2.4.1
 - mocha ~1.20.1 to ^1.21.5
 - supertest ~0.13.0 to ~0.14.0
Merge pull request #62 from strongloop/run-tests-agains-loopback-2x

package: update devDependencies
Add support for `context` and `res` param types
Test excluding context/req/res params from swagger