Pyasn1

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- API versioning mechanics retired (pyasn1.v1 -> pyasn1) what makes
it possible to zip-import pyasn1 sources (used by egg and py2exe).

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- Allow any non-zero values in Boolean type BER decoder, as it's in
accordnance with the standard.

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- Integer.__index__() now supported (for Python 2.5+).
- Fix to empty value encoding in BitString encoder, test case added.
- Fix to SequenceOf decoder that prevents it skipping possible Choice
typed inner component.
- Choice.getName() method added for getting currently set component
name.
- OctetsString.prettyPrint() does a single str() against its value
eliminating an extra quotes.

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- Large tags (>31) now supported by codecs.
- Fix to encoder to properly handle explicitly tagged untagged items.
- All possible value lengths (up to 256^126) now supported by encoders.
- Fix to Tag class constructor to prevent negative IDs.

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- Make use of setuptools.
- Constraints derivation verification (isSuperTypeOf()/isSubTypeOf()) fixed.
- Fix to constraints comparation logic -- can't cmp() hash values as it
may cause false positives due to hash conflicts.

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- License updated to vanilla BSD 2-Clause to ease package use
(http://opensource.org/licenses/BSD-2-Clause).
- Missing components added to rfc4210.PKIBody.
- Fix to rfc2459.CRLDistPointsSyntax typo.
- Fix to rfc2511.CertReqMsg typo.