Removing old OAuth

Replacing the old OAuth library with the new requests library
Complete Removal of oauth2
working prototype of post_with_media

Very basic working function that allows posting pictures to twitter.
PostMedia function update

finished function for uploading media to python
Update README.md
merged latest and some updates:
1) add 'lang' filed to Status class 
2) change MaximumHitFrequency to GetSleepTime to avoid rate limit 
2) modify GetFollowers, GetFollowerIDs, GetFriends, GetFriendsIDs using
GetSleepTime method
Merge branch 'master' of https://github.com/bear/python-twitter.git into wenyi
Revert "Removing old OAuth"

This reverts commit 3e64dc36a310e254ab255e93b8650360af06b837.
Revert "Complete Removal of oauth2"

This reverts commit c7a45acd3773ca7649ff0a6556c44e7afb9ed9e2.
Revert "Update README.md"

This reverts commit d29a3db71a38a5ecd66af31b1d36c8bc169c0c66.
Merge pull request #95 from jarobins/working

The Post Media Function
Merge remote-tracking branch 'origin/master' into wenyi

Conflicts:
	twitter.py
merge and clean up

add GetAVerageSleepTime function
Merge pull request #96 from bear/wenyi

lang in Status, new rate limit control
added GetListsList() (calls /lists/list ) and GetListTimeline() (calls
 /lists/statuses ) to the mix

GetListsList() duplicates some of what Getlists (list owned by user) and
GetSubscriptions (lists subscribed by user) but since twitter offers
this as a unified call... we now do.
Update twitter.html

Minor typo corrected.
Merge pull request #99 from moshekaplan/patch-1

Update twitter.html
Merge pull request #101 from jarobins/safe

GetRetweeters Function
Merge pull request #102 from jarobins/safe

Twitter Streaming Initial code
fixed problems with GetListTimeline() for Issue 103