adding global server vars as a feature.

Use like : -DGLOBAL_SERVER_VARS=true

in the template you can then use.

$ij.SERVER.host <-string
$ij.SERVER.path <-string
$ij.SERVER.port <-string
$ij.SERVER.scheme <-string
$ij.SERVER.query <-map
Merge pull request #1 from core9/develop

adding global server vars as a feature.