Add a Gitter chat badge to README.md

Only keep build. We test on Travis anyway, so testing again there only
wastes time.

Support MIX.

Fix v1.8.17

Add ESN support

Update params/bootnodes.go

Support Ethersocial network

Renames archive multi-geth-xxx -> ethoxy-multi-geth-xxx
for namespacing clarity

This also makes globbing for the deploy steps
easier, so we can just use one.

- travis: fix extra hyphen during deploy file globbing

add distribution archives for all tools

Refactors chain configuration and respective feature
implementations to use EIP definitions and methods,
instead of HardFork names, whenever possible. Doing so
attempts to address ambiguity and complexity in chain
configuration and feature implementation.

Signed-off-by: Isaac Ardis (isaac.ardis@gmail.com)

* NOTE: This is a cherry-picked commit, and has undergone
some manual merge conflict resolution. It may not be perfectly
perfect yet.

The original commit body:

Refactors chain configuration and respective feature
implementations to use EIP definitions and methods,
instead of HardFork names, whenever possible. Doing so
attempts to address ambiguity and complexity in chain
configuration and feature implementation.

Signed-off-by: Isaac Ardis (isaac.ardis@gmail.com)

consensus: fix wrong numbers for blockreward eips

IDK how these got off-by-one'd. Weird.

params: alphabetize ecip blocks

Because I'm anal like that.

consensus/ethash: fix mysterious off-by-one reward

Same as where the EIP number got incremented down. Weird.

params: note about json tag for eip160(F)Block

This is a bit of a sticky situation. Solves are either:
- use without 'F' here, break pattern, stay backwards
compatible for existing multi-geth clients, but incompatible
with ETH if they accept proposed changes as-is
- use with 'F' here, break backwards compatibility with
existing multi-geth clients, but be compatible with ETH as proposed
- push change without 'F' to ETH for review, keeping
in mind that it makes no sense for them to tangle their
code b/c of an establish multi-geth pattern
- push change without 'F' for any of the EIP160,161,170 to
eth. still breaks pattern for them

The root cause of this is that EIP158 namespace was used
to symbolize 3 separate EIPs... none of which ended up being
named 'EIP158'. Yea.

params: fix comment to be right

consensus/ethash: fix another damn offbyone increment

... these happened during the cherry-pick. wtf.