Linkedin & Twitter v2 by Social Auth

Linkedin api by SocialAuth. Twitter api v2 by Social Auth
SQLite database manipulations

add features of manipulation of database
actionbar/tabs, db support fb&tw&linkedin

add action bar and tabs for all type of contact source.
add SQLite database support (insert and select) for twitter and
linkedin; only insert supoort for facebook.
change a few file names to enhance visibility.
Merge pull request #11 from mrstrlc-yipeng/yipeng-v2

Linkedin & Twitter v2 by Social Auth + SQLite database manipulations + actionbar/tabs, db support fb&tw&linkedin