Update README.md

Author: andripwn

README.md

@@ -1,2 +1,28 @@
-# crawler-python
-email scraper/crawls using python (Google/Bing)
+Python Email Crawler
+====================
+
+This python script search/google certain keywords, crawls the webpages from the results, and return all emails found.
+
+Requirements
+------------
+
+- sqlalchemy
+- urllib2
+
+If you don't have, simply `sudo pip install sqlalchemy`. 
+
+
+Usage
+-------
+
+Start the search with a keyword. We use "iphone developers" as an example.
+
+	python email_crawler.py "iphone developers"
+
+The search and crawling process will take quite a while, as it retrieve up to 500 search results (from Google), and crawl up to 2 level deep. It should crawl around 10,000 webpages :)
+
+After the process finished, run this command to get the list of emails
+
+	python email_crawler.py --emails
+
+The emails will be saved in ./data/emails.csv