static-http: mimic more closely localrepo (issue2164: allow clone -r ) * httprangereader: name, __iter__ and close are needed to mimic file object * static-http opener: - disallow write/append modes - add (unused) atomictemp parameter * static-http repo: - root attribute is needed for localrepo.dirstate() - _branch* attributes are required for commitctx and branchmap calls * tags: force repo.opener.__iter__ call earlier to force httprangereader to try to read the cache early, to avoid raising IOError later.