README.md corrections and additions

README.md

@@ -1,3 +1,20 @@
+about
+=====
+
+sisyphus is a piece of software I wrote the context of my graduate automation
+project. My class was taking part in the IEEE ICRA 2012 Virtual Manufacturing
+Automation Competition and part of the competition, was to efficiently stack
+boxes of different sizes on a pallet.
+
+As the knapsack problem is NP hard, sisyphus implements hybrid between
+heuristic and bruteforce approach.
+
+The heuristic is, to group articles of same height into layers, and then stack
+those layers on top of each other.
+
+Different techniques to form layers and different orderings of stacking them
+are then tried out in a bruteforce manner.
+
 get the code
 ============
 
@@ -108,7 +125,7 @@ bruteforce3.py is recommended.
 
 The according line in run.sh could be changed to:
 
-iterations=100 randomize=1 python bruteforce2.py $1 | randomize=1 iterations=1000 xargs --max-procs=4 --max-args=1 python bruteforce3.py $1 $2 $3
+	iterations=100 randomize=1 python bruteforce2.py $1 | randomize=1 iterations=1000 xargs --max-procs=4 --max-args=1 python bruteforce3.py $1 $2 $3
 
 utility scripts
 ===============
@@ -157,7 +174,7 @@ utility scripts
 
     split_multi.py
 
-	takes a multiple pallet packlist.xml and outputs pairs of single pallet
+        takes a multiple pallet packlist.xml and outputs pairs of single pallet
         packlist.xml and order.xml files by appending _$i.xml and _order_$i.xml
         to the original packlist.xml filename, respectively. The integer $i
         starts at 0 and	will be incremented with each subsequent pallet.