GTimer: switch to monotonic time
GTimer: switch to monotonic time

and remove docs notes about threads having to be initialised.

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