Merge branch 'master' of github.com:zeroturnaround/java-fundamentals

Added debugging lecture examples

Fixed StAX example class name and made it use Reader and writer that have fixed encodings (UTF-8).

Added Jackson example

Removed some commented out code.

Some changes in the data examples:

Close some more streams

Close the stream returned by Files::walk

Changed FileLockExample to actually lock a temp file.

Updated some IO examples.

Updated current JF course URL and replaced System.out lambdas with method references in IO samples.

- Added examples for the debugging, troubleshooting lecture

Reset to demo

Ecipse beautify

Preset to clean demo