Use snake_case method names

Renamed:
- Message.formatMentions
- _util.digitToChar
- _util.generateMessageID
- _util.getSignatureID
- _util.generateOfflineThreadingID
- Client._markAlive

Renamed following Client methods:
- isLoggedIn
- getSession
- setSession
- _forcedFetch
- fetchThreads
- fetchAllUsersFromThreads
- fetchAllUsers
- searchForUsers
- searchForPages
- searchForGroups
- searchForThreads
- searchForMessageIDs
- searchForMessages
- _fetchInfo
- fetchUserInfo
- fetchPageInfo
- fetchGroupInfo
- fetchThreadInfo
- fetchThreadMessages
- fetchThreadList
- fetchUnread
- fetchUnseen
- fetchImageUrl
- fetchMessageInfo
- fetchPollOptions
- fetchPlanInfo
- _getPrivateData
- getPhoneNumbers
- getEmails
- getUserActiveStatus
- fetchThreadImages
- _oldMessage
- _doSendRequest
- quickReply
- _sendLocation
- sendLocation
- sendPinnedLocation
- _sendFiles
- sendRemoteFiles
- sendLocalFiles
- sendRemoteVoiceClips
- sendLocalVoiceClips
- forwardAttachment
- createGroup
- addUsersToGroup
- removeUserFromGroup
- _adminStatus
- addGroupAdmins
- removeGroupAdmins
- changeGroupApprovalMode
- _usersApproval
- acceptUsersToGroup
- denyUsersFromGroup
- _changeGroupImage
- changeGroupImageRemote
- changeGroupImageLocal
- changeThreadTitle
- changeNickname
- changeThreadColor
- changeThreadEmoji
- reactToMessage
- createPlan
- editPlan
- deletePlan
- changePlanParticipation
- createPoll
- updatePollVote
- setTypingStatus
- markAsDelivered
- _readStatus
- markAsRead
- markAsUnread
- markAsSeen
- friendConnect
- removeFriend
- blockUser
- unblockUser
- moveThreads
- deleteThreads
- markAsSpam
- deleteMessages
- muteThread
- unmuteThread
- muteThreadReactions
- unmuteThreadReactions
- muteThreadMentions
- unmuteThreadMentions
- _pullMessage
- _parseMessage
- _doOneListen
- setActiveStatus
- onLoggingIn
- on2FACode
- onLoggedIn
- onListening
- onListenError
- onMessage
- onColorChange
- onEmojiChange
- onTitleChange
- onImageChange
- onNicknameChange
- onAdminAdded
- onAdminRemoved
- onApprovalModeChange
- onMessageSeen
- onMessageDelivered
- onMarkedSeen
- onMessageUnsent
- onPeopleAdded
- onPersonRemoved
- onFriendRequest
- onInbox
- onTyping
- onGamePlayed
- onReactionAdded
- onReactionRemoved
- onBlock
- onUnblock
- onLiveLocation
- onCallStarted
- onCallEnded
- onUserJoinedCall
- onPollCreated
- onPollVoted
- onPlanCreated
- onPlanEnded
- onPlanEdited
- onPlanDeleted
- onPlanParticipation
- onQprimer
- onChatTimestamp
- onBuddylistOverlay
- onUnknownMesssageType
- onMessageError

examples/echobot.py

@@ -2,9 +2,9 @@ from fbchat import Client
 
 # Subclass fbchat.Client and override required methods
 class EchoBot(Client):
-    def onMessage(self, author_id, message_object, thread_id, thread_type, **kwargs):
-        self.markAsDelivered(thread_id, message_object.uid)
-        self.markAsRead(thread_id)
+    def on_message(self, author_id, message_object, thread_id, thread_type, **kwargs):
+        self.mark_as_delivered(thread_id, message_object.uid)
+        self.mark_as_read(thread_id)
 
         print("{} from {} in {}".format(message_object, thread_id, thread_type.name))