Updated .gitignore

Now excludes .iml files and the "idea" folder from IntelliJ
Also excludes .gradle files and "build" folder from gradle
Update gitignore

Adds *.ipr and *.iws files to the list
Merge pull request #5 from SirBif/gitignore

Updated .gitignore
Adds support for proxies

Now the rest task supports proxies, using the standard java system properties
Adds unit test to verify that the proxy gets set
Merge branch 'supportProxy' of github.com:SirBif/rest-gradle-plugin
Rewrite readme in asciidoc
Upgrading to Gradle 2.0
Bump to next snapshot version
Use Artifactory Gradle plugin to publish
Associate the plugin with a Gradle 2.0 ID
Update installation methods
Update README.asciidoc