Add new ruby library(sendgrid4r)
Add new ruby library(sendgrid4r)

The sendgrid_template_engine library has been deprecated.
Please use [sendgrid4r](https://github.com/awwa/sendgrid4r) instead.
Ranhiru/docs,katieporter/docs,taz77/docs,Ranhiru/docs,L2G/docs,hardikjain29/docs,sendgrid/docs,Aonepathan/docs,ksigler7/docs,GilUpstream/docs,Zaftula/docs,bogdanboss/docs,taz77/docs,GilUpstream/docs,bogdanboss/docs,taz77/docs,awwa/docs,hardikjain29/docs,jacobmovingfwd/docs,Zaftula/docs,jacobmovingfwd/docs,GilUpstream/docs,L2G/docs,jacobmovingfwd/docs,Zaftula/docs,L2G/docs,jacobmovingfwd/docs,hardikjain29/docs,Whatthefoxsays/docs,Aonepathan/docs,Ranhiru/docs,awwa/docs,GilUpstream/docs,bogdanboss/docs,hardikjain29/docs,Whatthefoxsays/docs,taz77/docs,katieporter/docs,Zaftula/docs,Zaftula/docs,Ranhiru/docs,bogdanboss/docs,ksigler7/docs,ksigler7/docs,Aonepathan/docs,hardikjain29/docs,Whatthefoxsays/docs,katieporter/docs,katieporter/docs,taz77/docs,GilUpstream/docs,bogdanboss/docs,Ranhiru/docs,awwa/docs,jacobmovingfwd/docs,awwa/docs,awwa/docs,Aonepathan/docs,Aonepathan/docs,L2G/docs,L2G/docs,sendgrid/docs,katieporter/docs,sendgrid/docs