Need to calculate alignment based on startIndex, not inputIndex
Base the aligned pointer from inbuf, not inptr
Removed MimeKit.Mac.csproj from the main solution to avoid annoying popups in Visual Studio
Throw the correct exception (which will never actually get thrown)
code cleanup
Use a case-insensitive match for openpgp keys
Properly handle null selectors in the dummy SecureMimeContext
Do our own OpenPGP keyId comparison (more secure to compare parsed email addresses)
Added a new TemporarySecureMimeContext which does not persist certs/keys/crls

Adds a feature requested in issue #38
Bumped version to 0.28.0.0
Added a Performance section to the README
Use OrdinalIgnoreCase instead of InvariantCultureIgnoreCase
Always use the System.Text.Encoding.GetString() variant that is available in Portable profiles
Use an int instead of a long
Use Buffer.BlockCopy() instead of Array.Copy()
Updated sources to conditionally use my new Portable.Text.Encoding

This goes a long way toward making MimeKit buildable as a PCL
Removed need for reflection in HeaderId.cs to make it more portable
formatting fixes
More fixes to support building as a PCL
Finished fixing up MimeKit to build as a PCL