Whitespace
More refactoring of Hadoop installation script
Merge pull request #39 from elzaggo/develop

More examples
Run Travis hadoop install in separate bash subshell

Previously we were sourcing it to let the installation script set
environment variables.
Set PATH in hadoop-env.sh to pick up the virtualenv environment
Merge pull request #41 from ilveroluca/refactor_hadoop_install

Refactor hadoop installation
Removed libhdfs from the src/hadoop-*/ location
Merge pull request #42 from kikkomep/develop

Removed libhdfs from the src/hadoop-*/ location
Added missing files.