Add README file

Author: cortinico

LICENSE

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+Copyright (c) 2020 Nicola Corti
+
+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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+# Advent of Code 2020
+
+[![AoC2020](https://img.shields.io/badge/%20%F0%9F%8E%84adventofcode-2020-red)](https://adventofcode.com/2020) ![Language](https://img.shields.io/github/languages/top/cortinico/adventofcode-2020?color=blue&logo=kotlin)
+[![Twitter](https://img.shields.io/badge/Twitter-@cortinico-blue.svg?style=flat)](http://twitter.com/cortinico)
+
+```kotlin
+val aMessageFromMe = """
+
+ |,\/,| |[_' |[_]) |[_]) \\//
+ ||\/|| |[_, ||'\, ||'\, ||
+
+ ___ __ __ ____ __ __ ____ _ _ __ __
+ // ' |[_]| |[_]) || ((_' '||' |,\/,| //\\ ((_'
+ \\_, |[']| ||'\, || ,_)) || ||\/|| //``\\ ,_))
+ 
+
+ ,;7,
+ _ ||:|,
+ _,---,_ )\' '|
+ .'_.-.,_ '. ',') j
+ /,' ___} \ _/ /
+ ., ,1 .'' =\ _.''. ,`';_ |
+ .' \ (.'T ~, (' ) ',.' / ';',
+ \ .\(\O/)_. \ ( _Z-'`>--, .'', ;
+ \ | I _|._>;--'`,-j-' ; ', .'
+ __\_| _.'.-7 ) `'-' " ( ;'
+ .'.'_.'|.' .' \ ',_ .'\ /
+ | | |.' / \ \ l \ /
+ | _.-' / '. ('._ _ ,.' \i
+,--' ---' / k _.-,.-|__L, '-' ' () ;
+ '._ ( '; ( _-} |
+ / ' \ ; ',.__; () /
+ / | ; ; ___._._____.: :-j
+| \,__',-' ____: :_____.: :-\
+| F : . ' ' , L
+', J | ; j |
+ \ | | L | J
+ ; .-F | ; J L
+ \___,---' J'--: j,---,___ |_ |
+ | |'--' L '--| '-'|
+ '.,L |----.__ j.__.'
+ | '----' |, '-' }
+ j / ('-----';
+ { "---'--;' } |
+ | | '.----,.'
+ ',.__.__.' |=, _/
+ | / | '.
+ |'= -x L___ '--,
+ L __\ '-----'
+ '.____)
+"""
+```
+
+Kotlin solutions for my [Advent of Code 2020](https://adventofcode.com/2020).
+
+If you enjoyed the event, don't forget to [support the event](https://adventofcode.com/2020/support) ❤️.
+
+## License 📄
+
+This code in this repository is licensed under the MIT License - see the [License](License) file for details