Update kakao agent, urls to class constant
Check device_uuid is valid base64 format

base64 padding check
Update appVer, move to class constant
Add gitignore
Add options in init, login class method
Move socket option code position
Add 'resp' argument in send methods
Fix image upload error

header value must be string
add 'resp' argument to ping method
Set default 'resp' argument to True in ping method
Fix ping
Add X-VC header for authenticate KakaoTalk account
Update KakaoTalk PC client version from 1.1.8 to 1.2.0
Merge pull request #19 from ssut/master

Works perfectly without image upload function.