Added 5 new methods & general improvements

[boeboe]

Added new methods:

• getCountry: get random country
• getCountryShort: get random country abbreviation (2 chars)
• getNationality: get random nationality
• getOccupation: get random occupation
• getHexText: get random hex string with given length

Some general improvements:

• Updated pom.xml to use latest version of maven plugins and dependencies
• Use clean-up/reformat code to change tabs into 4 spaces and wrap after 80 chars
• Some typo's fixed
• Added missing javadoc