[cutes] implementation suitable for any js engine

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jolla.com>
[cutes] no more v8-specific stuff, only generic code

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jolla.com>
code generator is python script

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jolla.com>
uses cor library

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jolla.com>