Build: Update license

Closes gh-11

Author: scottgonzalez

LICENSE-MIT.txt renamed to LICENSE.txt

@@ -1,8 +1,14 @@
-Copyright (c) 2013 jQuery Foundation, http://jquery.org/
+Copyright 2013, 2014 jQuery Foundation and other contributors,
+https://jquery.org/
 
 This software consists of voluntary contributions made by many
 individuals. For exact contribution history, see the revision history
-and logs, available at https://github.com/jquery/irc.jquery.org
+available at https://github.com/jquery/irc.jquery.org
+
+The following license applies to all parts of this software except as
+documented below:
+
+====
 
 Permission is hereby granted, free of charge, to any person obtaining
 a copy of this software and associated documentation files (the
@@ -21,4 +27,11 @@ 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.
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+====
+
+All files located in the node_modules directory are externally
+maintained libraries used by this software which have their own
+licenses; we recommend you read them, as their terms may differ from the
+terms above.