Replaced Solium in favor of Solhint (#1575)

* Adding solhint, working on style fixes.

* Upgraded to solhint 1.5.0.

* Removed all references to Solium

* Updated mocks to make the pass the new linter rules.

* Reformatted the .solhint.json file a bit.

* Removed Solium configuration files.

* Remove Solium dependency.

* Add comment explaing disabled time rule in TokenVesting.

* Revert to the old (ugly?) style.

* Revert SignatureBouncerMock style.

* Fix ERC165InterfacesSupported interface.

contracts/cryptography/ECDSA.sol

@@ -26,7 +26,7 @@ library ECDSA {
         // Divide the signature in r, s and v variables
         // ecrecover takes the signature parameters, and the only way to get them
         // currently is to use assembly.
-        // solium-disable-next-line security/no-inline-assembly
+        // solhint-disable-next-line no-inline-assembly
         assembly {
             r := mload(add(signature, 0x20))
             s := mload(add(signature, 0x40))
@@ -42,7 +42,6 @@ library ECDSA {
         if (v != 27 && v != 28) {
             return (address(0));
         } else {
-            // solium-disable-next-line arg-overflow
             return ecrecover(hash, v, r, s);
         }
     }