Update to latest multi_xml to fix security vulnerability.

This is similar to the issue that affected Rails, which allowed various
nasty remote code exploits and/or SQL injection. Some details here:
https://gist.github.com/d7f6d9f4925f413621aa

Bumped version to 0.2.05
Merge pull request #27 from smulube/security_update

Update to latest multi_xml to fix security vulnerability.
[gem] httparty bump to 0.10.0 *security vulnerability*
Merge pull request #28 from levent/gem/httparty

[gem] httparty bump to 0.10.0 *security vulnerability*
Switch cosm-rb local default to build/run with 1.9
Add debugger gem for debugging under ruby 1.9
If csv parsing gets empty content raise known exception

Don't let code get through to point where it tries to compare the size
of data with nil, as this is unhelpful.
Bump version to 0.2.07
Just run tests under MRI
Merge pull request #29 from smulube/bug/empty_csv_parsing

Bug/empty csv parsing