Create README.md

What is this, and why?

Author: lkbm

README.md

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+# My Advent of Code 2018 Solutions
+[Advent of Code](https://adventofcode.com/) is a month-long programming puzzle challenge.
+
+Herein, I'm solving the 2018 puzzles using Python3, because:
+1. I like Python.
+2. Jeez, I'm so bad at Python.
+3. Doing it in a language I don't know would be even more work, and I'm expecting to quit after a few days anyway because really, Luca, you're taking on extra homework?
+
+My goals/metrics are something along the lines of:
+1. Complete the tasks each day
+2. ...with clean, readable code
+3. ...that also runs reasonably efficiently
+4. ...and is slightly more robust than is strictly necessary, but keeping the error handling to a sane level.
+
+If I feel like I need to do more work, maybe I'll even write some tests.