Add japanese translation.
Update strings.xml
Update Japanese translations.
Merge pull request #58 from shotastage/master

Add Japanese translations.
French translation
Some very small optimizations
Merge pull request #61 from RyDroid/fr

French translation
Merge pull request #62 from RyDroid/master

Some very small optimizations
Fixed duplicity of commit items in CommitsList at start of CommitFragment
Store private SSH keys in internal memory.
Add a short quick-start guide
Added missing Java file type extension
Added missing extensions for ECL and Matlab types
Correcting minor grammatical error in success messages
Capitalisation consistent in success messages
Minor English corrections to dialog strings
"Opps" should be spelled "Oops"
Minor English corrections to error strings
Minor English corrections to dialog strings
Correcting typo in dialog strings