Implement Markov random text generator

[yujinyan]

Resolves #4

Changelist

• removed javafaker dependency
• fixed typo facktory in package name
• addded Markov random text generator

Issue regarding loading text from resources dir

Given this directory structure

src
    test
        kotlin
            GeneratorTest // use textGenerator here does not work
    testFixtures
        kotlin
            textGenerator // define text generator here
        resources
            hello.txt

where

val textGenerator = MarkovGenerator().aply {
    loadTextResource(''/hello.txt'')
}