+ updated ETDRS units to make all letter increments available for recording
+ removed redundant CMT element
+ updated OCT element to have the image type recorded
+ support for importing child elements when loading previous entries
Merge branch 'release/1.4' of github.com:openeyes/OphCiExamination into release/1.4

Conflicts:
	controllers/DefaultController.php
	migrations/m130701_131445_dr_function_2.php
	models/Element_OphCiExamination_CMT.php
	models/Element_OphCiExamination_Investigation.php
	models/Element_OphCiExamination_OCT.php
	models/OphCiExamination_OCT_Method.php
	views/default/_form.php
	views/default/_print_Element_OphCiExamination_CMT.php
	views/default/_view_Element_OphCiExamination_CMT.php
	views/default/form_Element_OphCiExamination_CMT.php