Merge pull request #72 from Unknwon/master

documentation for hot update
add build status
add Server info
Update cache docs
Some updates to cache README
Update: session README
Fix: session README
Merge pull request #73 from matrixik/master

Some docs updates
Fix: install en docs links
Update: clean and fix docs markdown
Update: clean and fix README markdown
Merge pull request #74 from matrixik/master

Clean and fix docs markdown
Update: supervisord en docs
Merge pull request #75 from matrixik/master

Small addition to supervisord en docs
Update: README
Merge pull request #76 from matrixik/patch-1

Update: README
fix bug substr
fix #81
log support file & logrotate
fix small bug for not return