Add BSD 3-clause LICENSE file

Adding everyone who contributed to the bornhack-website repo as co-authors for this commit.

Co-authored-by: Víðir Valberg Guðmundsson <valberg@orn.li>
Co-authored-by: Stephan Telling <st@telling.xyz>
Co-authored-by: Kasper Christensen <kasper@friischristensen.com>
Co-authored-by: Benjamin Bach <benjamin@overtag.dk>
Co-authored-by: Ronni Elken Lindsgaard <rlindsgaard@users.noreply.github.com>
Co-authored-by: Alexander Færøy <ahf@0x90.dk>
Co-authored-by: RadicalPet <sarah@radicalpet.net>
Co-authored-by: Reynir Björnsson <github@reynir.dk>
Co-authored-by: coral <jonas@jonasbengtson.se>
Co-authored-by: klarstrup <jonas@klarstrup.dk>
Co-authored-by: Janus Troelsen <ysangkok@gmail.com>
Co-authored-by: kugg <kugg@users.noreply.github.com>
Co-authored-by: Ximin Luo <infinity0@pwned.gg>
Co-authored-by: Henrik Kramshøj <hlk@kramse.org>
Co-authored-by: Jonty Wareing <jonty@jonty.co.uk>

LICENSE

@@ -0,0 +1,29 @@
+BSD 3-Clause License
+
+Copyright (c) 2016-2018, BornHack
+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 copyright holder 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.