Merge all existing examples

[keighrim]

• helloworld
• whitespace tokenizer
• Stanford tagger
• NLTK tagger

[keighrim]

Separate branches for each example? Or step-by-step branches as in whitespacetokenizer?

[keighrim]

Helloworld - it was dummy example, thrown away.

[keighrim]

WhitespaceTokenizer - merged into step1~step6 branches