Merge branch 'release/2.0.0'
create new folder and move some files.
show SDK version at README.md
updated podspec
fixed pod file
Merge branch 'develop'
project settings
fix header search path
Merge remote-tracking branch 'upstream/master' into fix_archive
Merge pull request #33 from 0x0c/move_category

create new folder and move some files.
Merge pull request #36 from 0x0c/fix_archive

fix header search path