Added Support for AT+CPAS and Read SMS

[satyamkr80]

I've added support to read SMS and get call status (AT+CPAS) similar to the getCallStatus function of adafruit fona library. All example codes are included in examples.

[LoicGRENON]

Nice work, I was interested in SMS reading feature and was starting to gather information when I found your PR.
You might want to fix the README as well though as SMS reading is also now possible with your PR :)

[satyamkr80]

Nice work, I was interested in SMS reading feature and was starting to gather information when I found your PR. You might want to fix the README as well though as SMS reading is also now possible with your PR :)

Thanks @LoicGRENON , I will update the Readme.md file.

[LoicGRENON]

Nice work, I was interested in SMS reading feature and was starting to gather information when I found your PR. You might want to fix the README as well though as SMS reading is also now possible with your PR :)

Thanks @LoicGRENON , I will update the Readme.md file.

@satyamkr80 Just in case you didn't saw it, I sent you a PR on your branch a while ago to add some more features.

[satyamkr80]

Nice work, I was interested in SMS reading feature and was starting to gather information when I found your PR. You might want to fix the README as well though as SMS reading is also now possible with your PR :)

Thanks @LoicGRENON , I will update the Readme.md file.

@satyamkr80 Just in case you didn't saw it, I sent you a PR on your branch a while ago to add some more features.

@LoicGRENON I am reviewing the changes and will merge them soon, Thanks for the fix.