* Initial implementation of keep-host argument
* Add keep-host parsing to the consulcatalog provider
* Update docs
* update from the current master
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by @ffix
add new remote param to docker and file providers
lint: http nil body
add support of remote ips to consul provider
local implementation of onlyfrom middleware
lint: missing comment
make proxy tests more readable
preffer public IP if any forwwarded
* add isStatic flag to mapper, implement for file and static providers
* handle static match response as a special case
* move assets conversion to load time
* rename static to assets everywhere for consistency
* don't overwride asset param in url mapper
* add documentation about assets mode
* add tests
