Fix LibP2P-Daemon installation in setup.py (#186)

* Rename ProtoCompileInstall and ProtoCompileDevelop to Install and Develop
* Install LibP2P-Daemon on setup install and setup develop
* Install Golang in Circle CI builds
* Add P2PD binary to gitignore

setup.py

@@ -31,17 +31,12 @@ def md5(fname, chunk_size=4096):
 here = os.path.abspath(os.path.dirname(__file__))
 
 
-class cd:
-    """Context manager for changing the current working directory"""
-    def __init__(self, newPath):
-        self.newPath = os.path.expanduser(newPath)
-
-    def __enter__(self):
-        self.savedPath = os.getcwd()
-        os.chdir(self.newPath)
-
-    def __exit__(self, etype, value, traceback):
-        os.chdir(self.savedPath)
+def md5(fname, chunk_size=4096):
+    hash_md5 = hashlib.md5()
+    with open(fname, "rb") as f:
+        for chunk in iter(lambda: f.read(chunk_size), b""):
+            hash_md5.update(chunk)
+    return hash_md5.hexdigest()
 
 
 def proto_compile(output_path):