Update LICENSE.md (#232)

* Update LICENSE.md

Suggesting simplification of the license. @GAIKA Thoughts?

* Update LICENSE.md

Author: ViralBShah

LICENSE.md

@@ -1,6 +1,6 @@
 The ArrayFire.jl package is licensed under the MIT "Expat" License:
 
-> Copyright (c) 2016: Joe Petviashvili.
+> Copyright (c) 2015-19: Julia Computing, Inc. and contributors
 >
 > Permission is hereby granted, free of charge, to any person obtaining a copy
 > of this software and associated documentation files (the "Software"), to deal
@@ -19,34 +19,3 @@ The ArrayFire.jl package is licensed under the MIT "Expat" License:
 > 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.
->
-
-Rewrite from scratch, original package by Julia Computing Inc:
-
-> Copyright (c) 2015, Julia Computing Inc.
-> 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 the ArrayFire 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 HOLDER 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.