Added licensing and readme

LICENSE

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+Monero Utilities
+Copyright (c) 2013 Go Authors
+Copyright (c) 2017 Paxos
+
+Portion of the code is Go Author's property, licensed under the BSD-3 license
+Portion of the code is Paxos's property, licensed under the MIT license
+
+const.go and edwards25519.go are licensed under BSD-3 (see LICENSE-BSD), all other files are licensed under MIT (see LICENSE-MIT).

LICENSE-BSD

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+Copyright (c) 2009 The Go Authors. All rights reserved
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+   * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

LICENSE-MIT

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+Monero Utilities
+Copyright (c) 2017, Paxos <jimmy.song@paxos.com>
+
+Permission is hereby granted, free of charge, to any 
+person obtaining a copy of this software and associated 
+documentation files (the "Software"), to deal in the 
+Software without restriction, including without 
+limitation the rights to use, copy, modify, merge, 
+publish, distribute, sublicense, and/or sell copies of 
+the Software, and to permit persons to whom the Software 
+is furnished to do so, subject to the following 
+conditions:
+
+The above copyright notice and this permission notice 
+shall be included in all copies or substantial portions 
+of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY 
+KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE 
+WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR 
+PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS 
+OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 
+OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT 
+OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH 
+THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

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+Monero Utilities
+================
+
+These are a set of utilities for working with Monero.

const.go

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 // Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// license that can be found in the LICENSE-BSD file.
 
 package moneroutil
 

edwards25519.go

@@ -1,6 +1,6 @@
 // Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// license that can be found in the LICENSE-BSD file.
 
 // Package edwards25519 implements operations in GF(2**255-19) and on an
 // Edwards curve that is isomorphic to curve25519. See