added .jenkins build script and sendgrid package api scripts and github readme
* added ci-repo and cookbooks/ci_dependencies
* added berksfile
* added berksfile.lock
* added vagrant file
Merge branch 'sendgrid_package_patch' into sendgrid-10.0.0

Conflicts:
	README.md
Merge branch 'sendgrid_package_patch' into sendgrid-10.0.0
use fpm to build twisted RPM.
add fpm gem package to ci_deps
add fpm path to package