Added some godoc
Added some godoc

... even though it's pretty simple already.
springning/goconvey,wallclockbuilder/goconvey,wallclockbuilder/assertions,aquilax/goconvey,wallclockbuilder/goconvey,leeola/goconvey,yaoshipu/goconvey,springning/goconvey,aquilax/goconvey,ansiz/goconvey,ansiz/goconvey,ansiz/goconvey,zj8487/goconvey,zj8487/goconvey,leeola/goconvey,leeola/goconvey,wallclockbuilder/goconvey,springning/assertions,yaoshipu/goconvey,zj8487/goconvey,wallclockbuilder/convey,aquilax/goconvey,springning/goconvey,yaoshipu/goconvey