Added userguide build goal to maven

.gitignore

build-doc.sh

pom.xml

userguide/docs/admin.md

userguide/docs/clients.md

userguide/docs/img/ad.png

userguide/docs/img/client/android/android-step1.jpg

userguide/docs/img/client/android/android-step2.jpg

userguide/docs/img/client/macos/macos-step1.png

userguide/docs/img/client/macos/macos-step2.png

userguide/docs/img/client/macos/macos-step3.png

userguide/docs/img/client/windows/windows-step0.png

userguide/docs/img/client/windows/windows-step1.png

userguide/docs/img/client/windows/windows-step3.png

userguide/docs/img/device_enroll.png

userguide/docs/img/ldap.png

userguide/docs/img/local.png

userguide/docs/img/map.png

userguide/docs/img/step1.png

userguide/docs/img/step2.png