client: add appendHeadElement util
client: add appendHeadElement util

gokmen/koding,kwagdy/koding-1,andrewjcasal/koding,sinan/koding,andrewjcasal/koding,sinan/koding,drewsetski/koding,drewsetski/koding,sinan/koding,rjeczalik/koding,andrewjcasal/koding,gokmen/koding,acbodine/koding,szkl/koding,mertaytore/koding,mertaytore/koding,acbodine/koding,koding/koding,cihangir/koding,rjeczalik/koding,acbodine/koding,sinan/koding,koding/koding,andrewjcasal/koding,szkl/koding,gokmen/koding,alex-ionochkin/koding,mertaytore/koding,mertaytore/koding,usirin/koding,drewsetski/koding,cihangir/koding,drewsetski/koding,jack89129/koding,drewsetski/koding,mertaytore/koding,szkl/koding,mertaytore/koding,kwagdy/koding-1,jack89129/koding,cihangir/koding,gokmen/koding,alex-ionochkin/koding,usirin/koding,szkl/koding,gokmen/koding,alex-ionochkin/koding,gokmen/koding,acbodine/koding,andrewjcasal/koding,cihangir/koding,acbodine/koding,drewsetski/koding,sinan/koding,jack89129/koding,sinan/koding,cihangir/koding,koding/koding,rjeczalik/koding,cihangir/koding,kwagdy/koding-1,kwagdy/koding-1,andrewjcasal/koding,andrewjcasal/koding,gokmen/koding,rjeczalik/koding,szkl/koding,gokmen/koding,mertaytore/koding,kwagdy/koding-1,cihangir/koding,usirin/koding,koding/koding,drewsetski/koding,alex-ionochkin/koding,usirin/koding,sinan/koding,rjeczalik/koding,alex-ionochkin/koding,usirin/koding,acbodine/koding,szkl/koding,alex-ionochkin/koding,koding/koding,alex-ionochkin/koding,mertaytore/koding,drewsetski/koding,acbodine/koding,szkl/koding,jack89129/koding,cihangir/koding,koding/koding,sinan/koding,acbodine/koding,kwagdy/koding-1,kwagdy/koding-1,jack89129/koding,rjeczalik/koding,szkl/koding,alex-ionochkin/koding,andrewjcasal/koding,usirin/koding,koding/koding,rjeczalik/koding,kwagdy/koding-1,jack89129/koding,usirin/koding,rjeczalik/koding,jack89129/koding,jack89129/koding,usirin/koding,koding/koding