Support IE

Download IEDriver from
32 bit:
http://selenium-release.storage.googleapis.com/2.41/IEDriverServer_Win32
_2.41.0.zip
64 bit:
http://selenium-release.storage.googleapis.com/2.41/IEDriverServer_x64_2
.41.0.zip

Specify system property "webdriver.ie.driver" to the binary file
that extracted from the zip.
Merge pull request #1 from renchaorevee/master

Support IE