add session store in ledis
Merge pull request #1 from chliang2030598/master

add session store in ledis
logs:default support fileline
fix the log test
Merge pull request #892 from dockercn/master

Add a beego session backend using LedisDB
fix the only file upload param
update the file upload to io.Pipe
fix #893
fix the import cycle not allowed
Revert "logs:default support fileline"

This reverts commit 1f26852610c8cf24ff054d8e62bb7a6416140992.
Revert "fix the log test"

This reverts commit ddbfc25e56900fe03ff7c8f6d3886802f3a880dd.
fix the log level
improve the Put #896
fix the init logger
fix the gofmt
fix #855 #859