Use URL query parameter render=1 to render content in raw mode.

Build only work with the current master of the package. Otherwise, I get this error.
```
...
# github.com/gogits/gogs/routers/api/v1/convert
routers/api/v1/convert/convert.go:200: undefined: gogs.Team
routers/api/v1/convert/convert.go:201: undefined: gogs.Team
...
```

Make it easier to keep track of upstream changes and bug fixes

Remote repository path is renamed but does not delete
outdated local copy which still has old repository path
as remote.

Module httplib will be replaced a well done third-party package
soon, so remove its unused tests

Updated to reflect version increment in commit 47adc0e.

Add missing dependencies

- #1496: fallback plain text
- #1002: add date header
- #913: fix encoding of header