Add 3 new restrictions to the schema compiler
Add 3 new restrictions to the schema compiler

 - can not extend schemas that already have paths
 - can not form list of schemas that already have paths
 - the path of a list schema, if given, must end with ':/'

ieei/glib,pstglia/platform-external-bluetooth-glib,djdeath/glib,tchakabam/glib,zsx/glib,krichter722/glib,antono/glib,Distrotech/glib,gale320/glib,ieei/glib-old-android,cention-sany/glib,justinkb/aosp-bluez.glib,cention-sany/glib,krichter722/glib,djdeath/glib,MathieuDuponchelle/glib,MathieuDuponchelle/glib,justinkb/aosp-bluez.glib,tamaskenez/glib,01org/android-bluez-glib,Distrotech/glib,cosimoc/glib,johne53/MB3Glib,dicer/android_external_glib,antono/glib,tchakabam/glib,tchakabam/glib,ahmedammar/platform_external_gst_glib,mzabaluev/glib,Distrotech/glib,bluez-android/glib,dicer/android_external_glib,pstglia/platform-external-bluetooth-glib,MathieuDuponchelle/glib,iConsole/Console-OS_external_bluetooth_glib,ieei/glib,pstglia/external-bluetooth-glib,darren-clark/android_platform_external_bluetooth_glib,endlessm/glib,01org/android-bluez-glib,01org/android-bluez-glib,bluez-android/glib,zsx/glib,pstglia/platform-external-bluetooth-glib,tchakabam/glib,01org/android-bluez-glib,ahmedammar/platform_external_gst_glib,djdeath/glib,ahmedammar/platform_external_gst_glib,zsx/glib,Distrotech/glib,dicer/android_external_glib,pstglia/external-bluetooth-glib,mzabaluev/glib,tamaskenez/glib,lukasz-skalski/glib,justinkb/aosp-bluez.glib,iConsole/Console-OS_external_bluetooth_glib,ieei/glib-old-android,krichter722/glib,Distrotech/glib,mzabaluev/glib,justinkb/aosp-bluez.glib,johne53/MB3Glib,pstglia/external-bluetooth-glib,mzabaluev/glib,endlessm/glib,lukasz-skalski/glib,krichter722/glib,gale320/glib,lukasz-skalski/glib,mzabaluev/glib,iConsole/Console-OS_external_bluetooth_glib,johne53/MB3Glib,johne53/MB3Glib,MathieuDuponchelle/glib,bratsche/glib,antono/glib,antono/glib,endlessm/glib,dicer/android_external_glib,iConsole/Console-OS_external_bluetooth_glib,pstglia/external-bluetooth-glib,bratsche/glib,pstglia/platform-external-bluetooth-glib,krichter722/glib,gale320/glib,gale320/glib,ieei/glib-old-android,djdeath/glib,bluez-android/glib,cosimoc/glib,cention-sany/glib,cention-sany/glib,lukasz-skalski/glib,justinkb/aosp-bluez.glib,bluez-android/glib,lukasz-skalski/glib,johne53/MB3Glib,zsx/glib,ieei/glib,johne53/MB3Glib,bratsche/glib,tchakabam/glib,iConsole/Console-OS_external_bluetooth_glib,endlessm/glib,ahmedammar/platform_external_gst_glib,tamaskenez/glib,ieei/glib,cosimoc/glib,darren-clark/android_platform_external_bluetooth_glib,gale320/glib,tamaskenez/glib,darren-clark/android_platform_external_bluetooth_glib,ieei/glib-old-android,djdeath/glib,ieei/glib,bratsche/glib,cention-sany/glib,bluez-android/glib,endlessm/glib,pstglia/platform-external-bluetooth-glib,MathieuDuponchelle/glib,darren-clark/android_platform_external_bluetooth_glib,tamaskenez/glib,cosimoc/glib,01org/android-bluez-glib,cosimoc/glib,dicer/android_external_glib,darren-clark/android_platform_external_bluetooth_glib,pstglia/external-bluetooth-glib