Merge pull request #37 from hail2u/ja-translation

Japanese translation
Update CONTRIBUTING for translation contributions
Update korean translation
Localize language switcher
Merge pull request #38 from marocchino/korean

Update korean, localize language switcher
Update git log style

Improve readability with Different colors
for different refs
Merge pull request #39 from pmiossec/patch-1

Update git log style
Update screenshot, as mentioned in #39
Read only task lists in markdown documents
Update task list in markdown documents
Update header for sub-catagory
Update Japanese translation