Add CHANGES.SlapOS.txt.

CHANGES.SlapOS.txt

+2.4.5+slapos001
+---------------
+
+- Support ${:_profile_base_location_}.
+- Support on the fly patches in easy_install.
+- Merge PYTHONEXTRAPATH value into PYTHONPATH in easy_install so that we can
+  use some eggs that are required to build an egg.
+- Support network cache in download.py and easy_install.py
+- Cache downloaded data in zc/buildout/buildout.py:_open() in memory
+  to accelerate remote extends.
+- Give the same permission but write as owner to group and other.
+- Make buildout.rmtree working with symlink as a path argument.
+    https://bugs.launchpad.net/zc.buildout/+bug/144228
+- Respect specified versions of initial eggs in bootstrap.
+- Keep develop-eggs directory in bootstrap.
+- Add referred parts' hash strings in __buildout_signature__, that invokes
+  rebuild of a part when one of its (recursive) dependencies are modified.
+- Allow assigning non-string values to section keys. Restricted to selected
+  python base types.
+- Write .installed.cfg only once, in safe way and only if there's any change.
+- Put only one [buildout] section in .installed.cfg.
+- Escape $$ character to $.
+- Compare Options with sorted result, if possible.
+- Add '--dry-run' option.
+- Add '--skip-signature-check' option.
+
+not applied (still required?)
+-----------------------------
+
+- 83fc3a2 Always use build() in easy_install.py to install eggs.
+  (it's not required if the commit below is not applied, I guess)
+- b7cd5ca Include '.postN' in generated egg's version so that version pinning with 'N.N.N.postN' works.
+- 1761c65 Workaround M2Crypto bug of https redirection.