static: fix infinite redirection when prefix is set (go-macaron#202)

Co-authored-by: ??????? <u@gogs.io>

static: handle If-None-Match for ETag. (go-macaron#200)

static: clean the path URL before redirecting (go-macaron#199)

codecov: formalize coverage settings (go-macaron#191)

Co-authored-by: Sourcegraph Bot <campaigns@sourcegraph.com>

context: add AllParams() (go-macaron#187)

* add func AllParams() for Context

It is usefull with for-each.

* add unit test for AllParams()

add unit test for AllParams()

* Update context_test.go

* Update context_test.go

* Update context_test.go

* Update context_test.go

Co-authored-by: ??????? <u@gogs.io>

Bump version

*: enable Go modules

context: handle special case in Context.SetParams

router: support autoHead for ComboRouter

ci: add Go 1.10