Multiple changes:

- Move to a Python process for the LanguageLink client [fixes #1, presumably]
- Finish a first rough draft of the booklet [fixes #4]

carp/src/bridge/carp.py

@@ -0,0 +1,13 @@
+import subprocess
+
+
+class CarpProc:
+    def __init__(self):
+        self.proc = subprocess.Popen(['carp'])
+
+    def evaluate(self, statements):
+        self.proc.stdin.send(statements)
+
+
+def start_carp_proc():
+    return CarpProc()