+* Ability to allow BER-encoded data with knowing if any of specified
+ field has either DER or BER encoding (or possibly indefinite-length
+ encoding)
+* Ability to use mmap-ed files, memoryviews, iterators and CER encoder
+ dealing with the writer, giving ability to create huge ASN.1 encoded
+ files without storing all the data in the memory first
+* Ability to decode files in event generation mode, without the need to
+ keep all the data and decoded structures in the memory
+* __slots__, copy.copy() friendliness
+* Workability with pickle
+* Cython compatibility
+* Descriptive errors, with decode paths