First commit, few files added

README.md

@@ -1 +1,12 @@
-42-fillit
+#Fillit
+
+##To do
+[x] Check if we have a file
+[x] Read file
+[] Check if there are errors in file
+[] Transform file into tetriminos
+[] Check if every tetrimino is valid
+[] Backtracking for smallest square
+[] Print result
+
+[] Transform tetriminos with letters (?)