update license per name change to web3.js

LICENSE

@@ -1,14 +1,14 @@
-This file is part of ethereum.js.
+This file is part of web3.js.
 
-ethereum.js is free software: you can redistribute it and/or modify
+web3.js is free software: you can redistribute it and/or modify
 it under the terms of the GNU Lesser General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
 (at your option) any later version.
 
-ethereum.js is distributed in the hope that it will be useful,
+web3.js is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU Lesser General Public License for more details.
 
 You should have received a copy of the GNU Lesser General Public License
-along with ethereum.js.  If not, see <http://www.gnu.org/licenses/>.
+along with web3.js.  If not, see <http://www.gnu.org/licenses/>.