Better message if user passes URL w/ no scheme

If it looks close to a URL, let's display a more informative error message
prompting them to add a scheme. If it's not close to a URL we just tell them
the URL is invalid.

Also add a README to the tests directory.
allow chaining of add_argument calls

i.e., RequestParser().add_argument('foo').add_argument('bar').parse_args()
typo in docs that were not right generated.
Added Eclipse files to .gitignore
Merge pull request #11 from Solution4Future/master

Fixing typo documentation and adding to .gitignore Eclipse/Aptana files
test argument chaining
added a real Fixed / Money Field
Merge pull request #14 from gbin/moneeey2

added a real Fixed / Money Field
Version bump
fields.Fixed now uses is_nan to account for values of 0
Merge pull request #15 from twilio/fixed_field_bug

fields.Fixed now uses is_nan to account for values of 0
Version bump
+inf -inf could sneak through it.
Merge pull request #16 from gbin/another_decimal_fix

+inf -inf could sneak through it.
Update docs/extending.rst

Fixed typo
Corrected the bug 21 + positive/negative test
Merge pull request #17 from robertfw/patch-1

Update docs/extending.rst
Merge pull request #10 from yaniv-aknin/patch-1

allow chaining of add_argument calls
Reply smart 404 error in case of slight mistakes in the URL
python 2.6 backward compatibility fix for r''