Knapsack problem added.

Author: writ3it

.gitignore

@@ -0,0 +1,2 @@
+*.lock
+/vendor/

README.md

@@ -1,2 +1,7 @@
 # libalgo
-PHP library of algorithms
+PHP library of algorithms.
+
+## Algorithms
+
+### Optimization problems
+- [Knapsack Problem](https://github.com/writ3it/libalgo-knapsack-problem)

composer.json

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+{
+    "name": "writ3it/libalgo",
+    "description": "PHP library of algorithms.",
+    "type": "metapackage",
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "writ3it",
+            "email": "git@writ3it.tech"
+        }
+    ],
+    "minimum-stability": "stable",
+    "require": {
+        "writ3it/libalgo-knapsack-problem": "^0.1.0"
+    }
+}