first changes
added 'elements' to the text
Changed the psycopg2 install method for Windows.

The current suggested method relies on git being installed
on the user's machine.
This new one is slightly more complex (there's an
extra step of downloading a prebuilt binary) but
it should work with nothing else installed.
split up Windows install instructions for psycopg2 and added Heroku Toolbelt install
added installation of Heroku Toolbelt during setup to allow pip-installing using Git for psycopg2 on Windows; I've kept the Toolbelt section in the deployment chapter too for people who have already gone through the setup
Merge pull request #29 from rebkwok/master

Proofreading changes
Merge pull request #27 from evildmp/html-chapter

Suggested changes for HTML chapter
Explain how to add Postgres to PATH on OS X
All codes are working.

* cleanup in codes

* some explanations and hints for some troubleshooting
Removed redundant info about installing psycopg2
Some more native speaker proofreading

Gave the 'database', 'code editor', 'Django installation' and 'Start a Django Project' pages a quick linguistic overhaul.
Merge pull request #30 from foonicorn/features/osx_postgres_path

Explain how to add Postgres to PATH on OS X
Resolved conflicts
Merge branch 'mcmillan-master'
resolved conflicts
Merge branch 'bmispelon-psycopg2-win-altinstall'
Fixed several typos
Added node_modules to .gitignore

This is helpful if you work with a local installation of gitbook.
Replaced computer disk with harddisk
Fixed example, the text above says one should type python3 in the terminal