cleanup merge

See merge request !6

# Conflicts:
#   README.md

Rename default namespace & update README

See merge request !5

Fix for key error when sending broadcast trx

See merge request !3

Fix for:
{"exception":"KeyError(0,)","message":"Internal Error","error_id":"65c8a0e4-ecd4-4424-a490-7f87cb0c889a","jrpc_request_id":1,"jussi_request_id":"001113248166147000","event":"Internal Error","logger":"jussi.errors","level":"error"}

while sending:
curl -s --data '{"jsonrpc":"2.0", "method":"network_broadcast_api.broadcast_transaction", "params":{"trx":{"ref_block_num":1097,"ref_block_prefix":2181793527,"expiration":"2016-03-24T18:00:21","operations":[{"type":"vote_operation","value":{"voter":"hiveio","author":"alice","permlink":"a-post-by-alice","weight":10000}}],"extensions":[],"signatures":[]},"max_block_age":50}, "id":1}' https://beta.openhive.network

 - Changed most variables from hard-coded export's, so that they only use their default value if
   the variable wasn't already set in the environment

 - Refactored most lines to follow shellscript standards, e.g. using `${}` where appropriate, quoting
   arguments and variables, etc.

 - Added some additional variables to make it easier to adjust individual portions of the docker tag
   through environment variables

 - Added basic information comment block to the top of the file explaining how to use the build script,
   and how to adjust the docker tag

 - Added a bash shebang and made the file executable

 - Added support for overriding the docker tag by passing an argument

 - Added `$DIR` variable, allowing `build.sh` to be ran from any working directory, without running
   into path context problems.

Fix build

See merge request !2

Community - adjust custom_json validator

update definition of invalid_broadcast_transaction for passing tests that should be failing in order to pass ;)

Example config file for using hivemind as a tags/follows replacement

Regex match on /proposals to route to steemd

Dont cache irreversible blocks forever

Fix ports in docker command

Ports should be 8080:8080, not 9000:9000

Fixes bug in which you cannot specify a port in the upstream config file

Maintenance updates

route get_state witnesses