Updated README.md to include badges and Steemit.chat link

Use last irreversible block -1 as ref for tapos

release 0.6.5

Set expiration to 600 sec

websocket client can now switch to appBase

Add method to do misc JSONRPC calls

Does not work well with ponyfills ;)

Also add better errors

fix condenser build with node 8.5 and webpack 1.5

Release v0.6.4

Update yarn.lock file

Add environment information to issue template

Fix params get_content_replies

Fix mapping role for `account_witness_vote` and `account_witness_proxy` operations