added cherry-pick JA translation
# This is a combination of 5 commits.
# The first commit's message is:
ja translation for detatchedHead.js

# This is the 2nd commit message:

ja translation for interactiveRebase.js

# This is the 3rd commit message:

ja translation for relativeRefs.js

# This is the 4th commit message:

ja translation for relativeRefs2.js, partial for last level in rampup

# This is the 5th commit message:

new version of ja translation for reversingChanges.js, but won't keep. will merge back to origin to respect previous translator after this commit
ja translation for detatchedHead.js

ja translation for interactiveRebase.js

ja translation for relativeRefs.js

ja translation for relativeRefs2.js, partial for last level in rampup

new version of ja translation for reversingChanges.js, but won't keep. will merge back to origin to respect previous translator after this commit

changes reverted for last level
Merge pull request #225 from renderf0x/levels_ja_112014

Japanese translations provided where missing for "rampup" levels