New examples, fixes, more docs

• Updated instructions
• Improved Makefile
• Allowed ping to the container
• Added new examples basic_nat_wlp and basic_routed
• Added LAN protection to original example
• Added docker-compose for sample

Official release

• Fixed typo in basic_nat example config wizard
• Consistency fix in Makefile
• Added docs for basic_nat example
• Added docs for commands, simple setup guide
• Added badges to README.md

First version

First version of OpenVPN container

Implemented:

• PKI handling with scripts
• Hooks scripts (in separate directories)
• Example config with wizard
• Docker Hub hook

Still missing:

• documentation
• microbadger badges