updated changelog for 2.1 and 2.2
Added 2.1 and 2.2 releases to changelog
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 configure.ps1 and run.ps1 that makes it possible to set up and run OB in windows seamlessly
Add setup.py to bootstrap py2exe
Add exe argument that invokes py2exe
Manually fix zope; allows py2exe to detect it properly

* Manually creating $packagesDir\zope\__init__.py fixes dependency detection
  by py2exe
Add ico file
Change output to dist_exe

* Do not include system dlls in the distribution directory
Update setup.py to include the icon
Don't assume that the script is on the current directory