added gulp.js with basic configuration to minify and concatenate Javascript files
Merge pull request #5 from Georepublic/feature-gulp

added gulp.js with basic configuration to minify and concatenate Javascr...
documentation
Update doc.md
updated documentation
updated documentation
updated documentation
Update doc.md
added clean, test, debug and build task
Merge branch 'merge_ftr' into feature-gulp
build docs and css (basics)
added simple server
added Potree.js to gulpfile scripts
separate libraries in build, fixes #12
Merge branch 'feature-gulp' of github.com:potree/potree into feature-gulp
Merge branch 'documentation' into develop
merged document folder into