release resources when closing gnutls session
call gnutls_global_init() each time we make a new ssl connection so we can ensure resources are correctly released when connections are closed
check gnutls_init_not_required before calling gnutls_global_deinit()
Fixes SASL compilation under Xcode 4.5

* Adds support for armv7s
* Correctly identifies when to use gcc instead of clang
Merge pull request #46 from coredumped/master

Fixes SASL dependency compilation under Xcode 4.5
Merge pull request #44 from welp/master

Release resources when closing gnutls session
Fix "make dist" leaving out two headers, mailstream_ssl_private.h
and mmapstring_private.h
Fix Windows (Mingw32) build.
Merge remote-tracking branch 'dinhviethoa/master'
More build fixes
Windows fix again
* More fixes!
Merge pull request #47 from colinleroy/master

A few fixes
support for Hurd (is it even used?)
support for IMAP ID (RFC 2971)
added missing files
mailimap_id included by default
fixed build errors. Thanks Scott Herscher.
Fixed build on Linux
fixed clang warning