Remove quotes from license.

Makes it easier to detect automatically

LICENSE.md

@@ -1,28 +1,28 @@
 The Tk.jl package is licensed under the MIT "Expat" License:
 
-> Copyright (c) 2013:
->  * Viral B. Shah
->  * John Verzani
->  * Tim Holy
->  * Jeff Bezanson
->  * Keno Fischer
->  * et al.
->
-> 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.
+Copyright (c) 2013:
+ * Viral B. Shah
+ * John Verzani
+ * Tim Holy
+ * Jeff Bezanson
+ * Keno Fischer
+ * et al. https://github.com/JuliaGraphics/Tk.jl/graphs/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 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.