Update index.html and .gitignore
Update the link to blog
Fix spelling (rename donwload.html to download.html)
Merge pull request #1 from matsuo/update-index

Update index.html and .gitignore
Merge pull request #2 from matsuo/update-bloglink

Update the link to blog
Merge pull request #3 from matsuo/modify-download-page

Fix spelling (rename donwload.html to download.html)