add !version and !source

closes #84

modules/info.py

@@ -0,0 +1,29 @@
+import os
+from src import IRCBot, ModuleManager, utils
+
+class Module(ModuleManager.BaseModule):
+    @utils.hook("received.command.version")
+    def version(self, event):
+        commit_hash = None
+        git_dir = os.path.join(self.bot.directory, ".git")
+        head_filepath = os.path.join(git_dir, "HEAD")
+        print(head_filepath)
+        if os.path.isfile(head_filepath):
+            ref = None
+            with open(head_filepath, "r") as head_file:
+                ref = head_file.readline().split(" ", 1)[1].strip()
+
+            ref_filepath = os.path.join(git_dir, ref)
+            print(ref_filepath)
+            if os.path.isfile(ref_filepath):
+                with open(ref_filepath, "r") as ref_file:
+                    commit_hash = ref_file.readline().strip()
+
+        out = "Version: BitBot %s" % IRCBot.VERSION
+        if not commit_hash == None:
+            out = "%s (%s)" % (out, commit_hash[:8])
+        event["stdout"].write(out)
+
+    @utils.hook("received.command.source")
+    def source(self, event):
+        event["stdout"].write("Source: %s" % IRCBot.SOURCE)