add a note on how to install from github

closes #258.
Merge pull request #264 from smallfish/master

Update pywsgi.py, support GET can require Body
fix PYTHONPATH in test___monkey_patching.py (#172)
README.rst: add 'running tests' section (#172)
changelog.rst: add dates to beta releases
changelog: copy entries for 0.13.7 and 0.13.8

from gevent013 branch
Ignore generated egg-info directory.
rm .hgignore and .hgtags
Update intro.rst

Made several grammatical edits for smoother reading, and corrected a spelling error. Also added missing conjunctions like "a" and "the" where appropriate.
Merge pull request #281 from philipaconrad/master

Documentation fixups
Merge pull request #269 from Metaswitch/1.0rc1-metaswitch

Ignore generated egg-info directory.
Remove -e from suggested pip install line

Using the -e flag creates an unnecessarily messy virtualenv, including bulky .git directories.  Switching the git url format seems to fix this.
fix failure of testSockName on travis

error was: gaierror: [Errno -2] Name or service not known
indent fix to pass pep8 1.4.6
Fix old documentation about default blocking behavior of kill, killall

In version v0.13.0 this was changed, says the docstrings, but the
function signature in the rst was never updated, suggesting that the
default block behavior is "False".
Merge pull request #306 from fdr/doc

Fix old documentation about default blocking behavior of kill, killall
makedev.sh: do not include greenlet dependency
Fix #6: patch sys after thread

from PR #232
add changelog entry for 1.0rc3
add test__issue6.py