support short input form of LCBC conditions
support short input form of LCBC conditions

- added transform_conditions(), used in transform_ebcs(), transform_ics() and
transform_lcbcs()

vlukes/sfepy,BubuLK/sfepy,rc/sfepy,lokik/sfepy,lokik/sfepy,lokik/sfepy,RexFuzzle/sfepy,olivierverdier/sfepy,vlukes/sfepy,vlukes/sfepy,RexFuzzle/sfepy,rc/sfepy,rc/sfepy,lokik/sfepy,BubuLK/sfepy,RexFuzzle/sfepy,sfepy/sfepy,sfepy/sfepy,olivierverdier/sfepy,RexFuzzle/sfepy,BubuLK/sfepy,sfepy/sfepy,olivierverdier/sfepy