Splice ./universe directory into ./

Manually merging:
- README.md: I added the description from universe/README.md into the heading of
  dotfiles/README.md.
- .envrc: dotfiles/.envrc was a superset of universe/.envrc
- .gitignore: Adding some of the ignored patterns from universe/.gitignore to
  dotfiles/.gitignore

Everything else here should be a simple rename.

universe/data_structures_and_algorithms/find-rotation-point.py

@@ -1,59 +0,0 @@
-import unittest
-
-
-################################################################################
-# Solution
-################################################################################
-def find_rotation_point(xs):
-    """Usage of `visited` here is a hack, but works for the test cases
-    (gulp)."""
-    i = 0
-    j = round(len(xs) / 2)
-    result = None
-    visited = set()
-    while not result:
-        if i in visited:
-            i += 1
-        if j in visited:
-            j -= 1
-        visited.add(i)
-        visited.add(j)
-        if xs[j - 1] > xs[j]:
-            result = j
-        elif xs[i] < xs[j]:
-            i = j
-            j += round((len(xs) - j) / 2)
-        elif xs[i] >= xs[j]:
-            i = j
-            j -= round((j - i) / 2)
-    return result
-
-
-################################################################################
-# Tests
-################################################################################
-class Test(unittest.TestCase):
-    def test_small_list(self):
-        actual = find_rotation_point(['cape', 'cake'])
-        expected = 1
-        self.assertEqual(actual, expected)
-
-    def test_medium_list(self):
-        actual = find_rotation_point(
-            ['grape', 'orange', 'plum', 'radish', 'apple'])
-        expected = 4
-        self.assertEqual(actual, expected)
-
-    def test_large_list(self):
-        actual = find_rotation_point([
-            'ptolemaic', 'retrograde', 'supplant', 'undulate', 'xenoepist',
-            'asymptote', 'babka', 'banoffee', 'engender', 'karpatka',
-            'othellolagkage'
-        ])
-        expected = 5
-        self.assertEqual(actual, expected)
-
-    # Are we missing any edge cases?
-
-
-unittest.main(verbosity=2)