Check if we passed an override parameter for layers #136
Merge pull request #262 from Delawen/136

Fixing issue #136: If there is a layer array on the parameters, it should override the default options
Fixing a really weird bug on IE I don't even know how to report.
Merge pull request #264 from Delawen/99

Fixes #99 on develop
Merge pull request #255 from Delawen/develop

Improvements related on harvesters
One findbug fix.
Harvester / Notification / Add french translation.
Harvester / OGC WMS / Options to only create layer metadata when metadataURL is available (#260).