Added submodule changelog ganerator:

Updated FML:
MinecraftForge/FML@e74087ee43 Ignore again, testing submodule.

fml

@@ -1 +1 @@
-Subproject commit f329084f1f0e2989fff58c0fc7c7275766c3d4fd
+Subproject commit e74087ee430633475c3ca058e54e3ef242a9d6aa

submodule_changlog.py

@@ -0,0 +1,46 @@
+import subprocess, sys, os
+from pprint import pformat
+from optparse import OptionParser
+
+def run_command(command, cwd='.'):
+    #print('Running command: ')
+    process = subprocess.Popen(command, stdout=subprocess.PIPE, stdin=subprocess.PIPE, stderr=subprocess.STDOUT, bufsize=1, cwd=cwd)
+    out, err = process.communicate()
+    out = out.strip('\n')
+    #print(pformat(out.split('\n')))
+    if process.returncode:
+        print('failed: %d' % process.returncode)
+        return None
+    return out.split('\n')
+  
+def main(options, args):
+    output = run_command(['git', 'diff', '--no-color', '--', 'fml'])
+    if output is None:
+        print('Failed to grab submodule commits')
+        sys.exit(1)
+    
+    start = None
+    end = None
+    for line in output:
+        if not 'Subproject commit' in line:
+            continue
+        if line[0:18] == '-Subproject commit':
+            start = line[19:]
+        elif line[0:18] == '+Subproject commit':
+            end = line[19:]
+    
+    if start == None or end == None:
+        print('Could not extract start and end range')
+        sys.exit(1)
+    
+    output = run_command(['git', 'log', '--reverse', '--pretty=oneline', '%s...%s' % (start, end)], './fml')
+    print('Updated FML:')
+    for line in output:
+        print('MinecraftForge/FML@%s' % line)
+    
+    
+if __name__ == '__main__':
+    parser = OptionParser()
+    options, args = parser.parse_args()
+    
+    main(options, args)