LICENSE and package.xml added for PECL

Signed-off-by: Nick Tolomiczenko <nick.tolomiczenko@gmail.com>
Fixed grammer in package.xml summary

Signed-off-by: Nick Tolomiczenko <nick.tolomiczenko@gmail.com>
Updated package.xml notes

Signed-off-by: Nick Tolomiczenko <nick.tolomiczenko@gmail.com>