[ADD] Added Globals documentation.

[CHANGE] Changed internal documentation in VoIP.py.
[CHANGE] Changed tox.ini file to update new flake8 settings.

docs/Globals.rst

@@ -0,0 +1,10 @@
+Global Variables
+########
+
+There are a few global variables that may assist you if you're having problems with the library.
+
+pyVoIP.\ **DEBUG** = False
+    If set to true, pyVoIP will print debug messages that may be useful if you need to open a GitHub issue.  Otherwise, does nothing.
+
+pyVoIP.\ **TRANSMIT_DELAY_REDUCTION** = 0.0
+    The higher this variable is, the more often RTP packets are sent.  This *should* only ever need to be 0.0.  However, when testing on Windows, there has sometimes been jittering, setting this to 0.75 fixed this in testing, but you may need to tinker with this number on a per-system basis.

pyVoIP/VoIP.py

@@ -135,7 +135,8 @@ def __init__(
                             )
                             assoc[int(x)] = p
                         except ValueError:
-                            # sometimes rtpmap raise a KeyError because fmtp is set instate
+                            # Sometimes rtpmap raise a KeyError because fmtp
+                            # is set instate
                             pt = i["attributes"][x]["rtpmap"]["name"]
                             warnings.warn(
                                 f"RTP Payload type {pt} not found.",

tox.ini

@@ -1,8 +1,6 @@
 [flake8]
 ignore = 
     # Default Ignore's removed:
-    # E226: missing whitespace around arithmatic operator
-    # E241: multiple spaces after ','
-    # E242: tab after ','
+    # E203 whitespace before ':'
     # W503 line break before binary operator
-    E121,E123,E126,E133,E704,W504
+    E203,W503