Build: A lot of changes

Added semantic-release with a better TravisCI config; linted and moved around some files (for
consistency sake)

.github/CONTRIBUTING.md

@@ -1,7 +1,6 @@
 # Contribution guide
 
-1.  Make sure you always pull the latest changes from the repo and `rebase` from the
-`master` branch whenever it's necessary.
+1.  Make sure you always pull the latest changes from the repo and `rebase` from the `master` branch whenever it's necessary.
 2.  Always work on the `dev` branch or dedicated branches (e.g.: for features).
 3.  Don't modify generated files in `/doc` and in `/dist`.
 4.  Squash commits in branches to reduce the chain whenever its possible.
@@ -14,5 +13,6 @@ with `npm run lint`).
 
 ## Project structure
 -   **`build`**: contains built files for distribution.
+-   **`doc`**: contains documentation files.
 -   **`src`**: contains source files.
--   **`test`**: contains all tests, unit tests are written using Jest and E2E are written with Nightwatch. 
+-   **`tests`**: contains all tests, unit tests are written using Jest and E2E are written with Nightwatch. 

.github/ISSUE_TEMPLATE.md

@@ -12,11 +12,11 @@ How do you think, the issue should be solved ?
 If it's a feature idea discussion, what feature(s) do you suggest ?
 
 ## Environment
-- Version: Essence 2.x.y
-- OS(s): 
-- Browser(s): 
-- Language: ES6/7
-- Node version:
-- NPM version: 
+-   Version: Essence 2.x.y
+-   OS(s): 
+-   Browser(s): 
+-   Language: ES6/7
+-   Node version:
+-   NPM version: 
 
 ## Additional information

.github/TODO.md

@@ -1,4 +1,16 @@
-1.  Change dependabot badge to the correct one (in README)
-2.  Add (S)CSS linting stuff
-3.  Add git labels
-4.  Make sure the badges are correct
+-   [X] Add Elliptic Curve DSA
+-   [X] Add wallets with addresses and PK/SK pairs
+-   [ ] Prevent double-spending
+-   [X] Make sure that only available coins can be spent and that there's enough fee which goes to the correct place
+-   [ ] REST interface
+-   [ ] P2P using websocket (ws package)
+-   [ ] DB to save the blockchain and the wallets (to avoid loosing progress)
+-   [ ] GUI for the blockchain
+-   [X] Use Merkel trees (such as [this](https://github.com/miguelmota/merkle-tree))
+-   [ ] Add Proof of Stake
+-   [ ] Add consensus to the chain ([grey paper](https://hackernoon.com/building-a-blockchain-the-grey-paper-5be456018040))
+-   [ ] Adding Smart contracts
+-   [ ] Changing BANK into a proper wallet (so hide the sk and promote its wallet to itself)
+-   [ ] Making sure the documentation covers the source modules
+-   [X] Create a logo for the coin
+-   [X] Add a code coverage check

.travis.yml

@@ -1,13 +1,24 @@
 language: node_js
-node_js:
-  - "node"
 cache:
   directories:
-    - "node_modules"
+    - ~/.npm
+notifications:
+  email: false
+node_js:
+  - 'node'
+  - '10'
+  - '9'
+  - '8'
+  - '6'
 install:
-    npm i -g codecov
-# safelist
+  - npm i
+  - npm i codecov jest eslint
+script:
+  - npm run lint
+  - npm test
+  - codecov
+after_success:
+  - npm run travis-deploy-once "npm run semantic-release"
 branches:
-  only:
-  - master
-  - /^v\d+\.\d+(\.\d+)?(-\S*)?$/ #vX.Y
+  except:
+    - /^v\d+\.\d+\.\d+$/