added simple docker build file
introduced USE_KRNL flag to enable/disable kernel module compilation for linux (compiling kernel module in docker container fails)
Fixed Makefile
Fixed Dockerfile, it works now.
- uses ubuntu image
- installs dependencies
- clones & builds ccn-lite
- runs testscript

To test it yourself, run: `docker build -t ccn-lite .` in the docker folder.
added comment for USE_KRNL flag in Makefile
Workdir for Dockerfile
Dockerfile pulls most recent branch instead of fetch
Fixed conflict in Makefile comment
Dockerfile adds local files directly instead of downloading them
Merge branch 'docker-integration' into dev-basil
Added links to official packet encoding spec to chunking doc
removed old env variable from Dockerfile
added tutorial
Improved tutorial.md
Improved tutorial.md
added images for tutorial
Added content lookup scenarios/demos to tutorial
Merge branch 'dev-basil' into dev-master