Update source docs
Revert "Update source docs"

This reverts commit 10d06cd4ff3038d2f02a18936793969e7aee0bda.
Update source docs
Fix English and improve by Stas. Thanks :)
Merge branch 'PHP-5.4' into PHP-5.5

* PHP-5.4:
  Fix English and improve by Stas. Thanks :)
  Update source docs
  Revert "Update source docs"
  Update source docs
Merge branch 'PHP-5.5' into PHP-5.6

* PHP-5.5:
  Fix English and improve by Stas. Thanks :)
  Update source docs
  Revert "Update source docs"
  Update source docs

Conflicts:
	README.EXTENSIONS