Add the description of sessionStorage for the Local Context
Event Info update and correct bad link.
Ver.4.4. released
Update after 4.4 and event information
Documentation updated.
Update start-up guide.
Fix spelling
Add some keyword
Merge pull request #11 from matsuo/update-localcontext

Add the description of sessionStorage for the Local Context
Merge pull request #12 from matsuo/fix-spelling

Fix spelling