Add check for pandas builtin for progress apply

Applied func will be checked against pandas internal builtins in order
to apply proper transformation, i.e max->amax

Closes:#697

tqdm/std.py

@@ -727,6 +727,8 @@ def inner(df, func, *args, **kwargs):
                         " Use keyword arguments instead.",
                         fp_write=getattr(t.fp, 'write', sys.stderr.write))
 
+                func = df._is_builtin_func(func)
+
                 # Define bar updating wrapper
                 def wrapper(*args, **kwargs):
                     # update tbar correctly

tqdm/tests/tests_pandas.py

@@ -130,7 +130,7 @@ def task_func(x):
 def test_pandas_groupby_apply():
     """Test pandas.DataFrame.groupby(...).progress_apply"""
     try:
-        from numpy.random import randint
+        from numpy.random import randint, rand
         import pandas as pd
     except ImportError:
         raise SkipTest
@@ -144,6 +144,11 @@ def test_pandas_groupby_apply():
         dfs = pd.DataFrame(randint(0, 50, (500, 3)), columns=list('abc'))
         dfs.groupby(['a']).progress_apply(lambda x: None)
 
+        df2 = df = pd.DataFrame(dict(a=randint(1, 8, 10000), b=rand(10000)))
+        res1 = df2.groupby("a").apply(max)
+        res2 = df2.groupby("a").progress_apply(max)
+        assert(res1.equals(res2))
+
         our_file.seek(0)
 
         # don't expect final output since no `leave` and