updated changelog for 2.1 and 2.2
Added 2.1 and 2.2 releases to changelog
Move exception out of crypto_util
Refactor guid exists check
Merge pull request #880 from hoffmabc/decline-legacy-msgs

Move exception out of crypto_util
Merge pull request #876 from gubatron/changelog-sync-issue-831

Changelog sync - Issue #831
Remove zlib dependency and usage
Return early when decryption fails. Fix #883.
Merge pull request #885 from Renelvon/fix_unbound

Return early when decryption fails. Fix #883.
Up the version
Merge pull request #877 from hoffmabc/hotfix-compression

[Hotfix] Remove zlib compression calls
Merge branch 'master' into backmerge-0.2.3

Conflicts:
	configure.sh
	node/connection.py
	node/transport.py

* Immaterial conflicts in configure.sh.
* Immaterial conflict in node/connection.py: Since #839 the message is
  sent uncompressed by default.
* Conflicts in node/transport.py due to various refactorings, mostly the
  PeerListener extraction (#678): _on_raw_messge now resides in
  node/connection.py and it does not decompress the message since #839.
Update changelog and README.
Merge pull request #886 from Renelvon/backmerge-0.2.3

Backmerging master 0.2.3
Make OB singleprocess in frozen mode
Add scripts for configuring and executing OB in Windows.
Add setup.py to bootstrap py2exe

* Create two exe files, openbazaar.exe and stop.exe
* Write the collected files into dist_exe directory
* Openbazaar.exe uses the local bootstraper openbazaar.py
* Add an ico file and use it for openbazaar.exe
* Do not include system dlls in the distribution
Add exe argument that invokes py2exe

* Manually creating $packagesDir\zope\__init__.py fixes dependency detection
  by py2exe
Workaround pycountry inclusion to make it work with py2exe

* Create the egg file for pycountry in configure.ps1
* Do not include pycountry in the zip bundle
* Manually include pycountry-1.8-py2.7.egg as a data file
* Manually include pkg_resources package because pycountry depends on this
  but py2exe doesn't detect it as a dependency any more
* Make the bootstrapper load pycountry from its egg file
Refactor the bootstrapper script

* Reorder some commands
* Add comments