compress level test fixed

为orm接口添加注释

Fix joins for reverse(many) with custom pk

Revert "go test fixed"

go test fixed

clean compliated codes, refactor if sections in app.go

Added MaxMemory limit to CopyBody() Supersedes #1484

Beego only uses the MaxMemory flag when using go's built in functions
for parsing forms. However the CopyBody() function have no limit an will
coppy anny amount of data into memory using ioutil.ReedAll() on the
request body whitout anny size validation or limit.

This fix wrapps input.Requst.Body in a LimitedReader using the same
memory limit as ParseFormOrMulitForm()

 - Also add test covering the issue

Revert "compress method fixed"

compress method fixed

in http,the deflate is zlib compress method accoding to the sec
http://tools.ietf.org/html/rfc2616#section-3.5
The "zlib" format defined in RFC 1950 [31] in combination with
        the "deflate" compression mechanism described in RFC 1951 [29].

	windows下静态文件映射找不到问题以及 grace init延后

windows下路径需要filepath.ToSlash

This reverts commit 2c8cb569.