Add composer support and increment the minor version of this
extension (1.0 -> 1.1.0).

Used PHP_Compatinfo (pci -d) to check required php version.

Change-Id: I71a3d64f71ada66217b627981d45f0b678ce55f2
Merge "Add composer support and increment the minor version of this extension (1.0 -> 1.1.0)."