Log Message:
Revision 0.3.1:
- ASN.1 types __init__(), .clone() and .subtype() signatures
  refactored into keyword arguments to simplify their signatures.
- ASN.1 types initialization refactored to minimize the use of
  relatively expensive isNoValue() call
- Lazily pre-populate list of values of Sequence/Set/Choice types
- NamedTypes comparison made more efficient
- More efficient constraints computation and code clean up
- The __getitem__() implementation of some ASN.1 types & tag object
  refactored for better performance
- BER/CER/DER value encoders refactored to produce either tuple of
  bytes or octet-stream depending on what is more optimal
- Reduced the frequency of expensive isinstance() calls
- Tag-related classes optimized, refactored into properties and
  documented.
- The NamedValues implementation refactored to mimic Python dict, its use
  in ASN.1 types refactored into properties and better documented.
  WARNING: this change introduces a deviation from original API.
- NamedType family of classes overhauled, optimized and documented.
- The `componentType` attribute of constructed ASN.1 types turned
  read-only on instances.
- Sequence/Set DER/CER/DER decoder optimized to skip the case of
  reordered components handling when not necessary.
- Tags and constraints-related getter methods refactored into read-only
  instance attributes.
- The .hasValue() method refactored into .isValue property. All ASN.1
  objects now support them, not just scalars.
- The Real.{isInfinity, isPlusInfinity, isMinusInfinity} methods
  refactored into properties and renamed into IsInf, IsPlusInf and isMinusInf
- The end-of-octets type refactored to ensure it is a singleton. Codecs
  changed to rely on that for better performance.
- Codecs lookup made more efficient at BER/CER/DER decoder main loop by
  assigning `typeId` to every ASN.1 type, not just ambiguous ones.
- The .getComponent*() methods of constructed ASN.1 types changed
  to lazily instantiate underlying type rather than return `None`.
  This should simplify its API as initialization like `X[0][1] = 2` becomes
  possible.
  WARNING: this change introduces a deviation from the original API.
- The .setComponent*() methods of SetOf/SequenceOf types changed not
  to allow uninitialized "holes" inside the sequences of their components.
  They now behave similarly to Python lists.
  WARNING: this change introduces a deviation from the original API.
- Default and optional components en/decoding of Constructed type
  refactored towards better efficiency and more control.
- OctetsString and Any decoder optimized to avoid creating ASN.1
  objects for chunks of substrate. Instead they now join substrate
  chunks together and create ASN.1 object from it just once.
- The GeneralizedTime and UTCTime types now support to/from Python
  datetime object conversion.
- Unit tests added for the `compat` sub-package.
- Fixed BitString named bits initialization bug.
- Fixed non-functional tag cache (when running Python 2) at DER decoder.
- Fixed chunked encoding restriction on DER encoder.
- Fixed SET components ordering at DER encoder.
- Fixed BIT STRING & OCTET STRING encoding to be always non-chunked (e.g.
  primitive) at DER encoder
- Fixed `compat.integer.from_bytes()` behaviour on empty input.