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
Update README.md
build docs and css (basics)
added simple server
updated documentation
Merge branch 'documentation' of https://github.com/potree/potree into documentation
removed license text from all files
Merge branch 'master' of https://github.com/potree/potree
updated lion demo
added documentation for materials
updated materials documentation