FreeNAS/freenas 5b576f2. Jenkinsfile, jenkins Jenkinsfile-PR Jenkins-depends.sh

Merge pull request #1220 from freenas/proper-pipeline

Add first pass attempt at a Jenkins pipeline which removes ixbuild
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+108-0jenkins/Jenkinsfile-PR
+98-0jenkins/Jenkins-depends.sh
+0-80Jenkinsfile
+206-803 files

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