Update /en/page_navi.html to fix missing link
Merge pull request #6 from matsuo/fix-link-to-docs-deploy

Update /en/page_navi.html to fix missing link
PHP version description is added the upper limit.
Manual/Expression and Send mail added.
Ver.4.2 released, and download page modified.
en/deploy is translated, and some news.
Local Context and storing criteria sort infos.