Added features, usable in Redux projects, works with Metamask

[balasan]

Apologies for a very big PR.

General build updates

• Refactor webpack config to not include dependencies in the build
• Remove dist from .gitignore for easy npm installs via github

Overview of New Features

• Drizzle now watches and updates account balances
  • Breaking change: accounts state now contains ids and balances fields (see README)
• Ability to use Metamask for accounts and sending/signing transactions (includes PR Add an option to ignore metamask #15)
• Easier access to contract methods via store
  • Breaking change: contracts state is now stored in a state objects to avoid any naming collisions (see README)
• Moved initialization of contract state from generateStore.js to DrizzleContracts.js
• Added reducer and rootSaga to exports for use in existing redux projects

here is an example of using drizzle + Metamask in an existing redux app: https://github.com/relevant-community/bonding-curve-component/tree/redux/demo

closes: #10, #11 (and #20 sorta)

[balasan]

Ah just saw that the develop branch has diverged a bit @DiscRiskandBisque let me know if you're interested in incorporating any of these — especially getting it to work with existing redux projects and I can take a stab at the develop branch.

[tarrencev]

Would love the webpack changes to be merged asap

[balasan]

hey @tarrencev this PR is out of date with the master branch at this point, but I opened a separate one here #26 with just the webpack changes — hoping it will get merged soon!

[balasan]

closing this because its outdated - newer PRs include most of these updates