Added .idea to .gitignore. Builds with JetBrains CLion.
Added .idea to .gitignore. Builds with JetBrains CLion.

potree/PotreeConverter,sverhoeven/PotreeConverter,kyroskoh/PotreeConverter,Georepublic/PotreeConverter,sverhoeven/PotreeConverter,kyroskoh/PotreeConverter,potree/PotreeConverter,Georepublic/PotreeConverter,sverhoeven/PotreeConverter,eokeeffe/PotreeConverter,potree/PotreeConverter,potree/PotreeConverter,potree/PotreeConverter,eokeeffe/PotreeConverter,potree/PotreeConverter,potree/PotreeConverter,kyroskoh/PotreeConverter,Georepublic/PotreeConverter,eokeeffe/PotreeConverter,Georepublic/PotreeConverter,sverhoeven/PotreeConverter,kyroskoh/PotreeConverter