Updated Travis CI configuration
Use gemspec and bundle/gem_tasks instead of Jeweler

This commit introduces changes in order to use the standard way of
dealing with rubygems -- having a gemspec in the repository plus using
bundle/gem_tasks to manage building and uploading the gem to rubygems.
Update Rakefile

- Remove Jeweler.
- Add console task to open IRB with statsample-glm loaded.
Merge pull request #1 from agarie/use_bundler_gem_tasks

Use bundler gem tasks
Ported MLE and IRLS to statsample-glm with API changes and RSpec migration.
Successfully ported MLE and IRLS into statsample-glm with API changes and migration to RSpec.
Changed the GLM API for consistency

Added option for constants

MLE integration in progress

IRLS almost integrated

IRLS almost integrated

Finished IRLS integration

Started RSpec migration and ironing out of MLE

Nearing MLE complete integration

MLE and IRLS integration finished

Fixed rakefile

Restructure and itegrating normal MLE

Ported Normal MLE successfully.

Travis isues

Added 1.9.3 support
Merge pull request #2 from v0dro/master

Changed the GLM API for consistency
Major version bump due to API change
Merge pull request #3 from v0dro/master

Major version bump due to API change
Merge pull request #1 from SciRuby/master

Revamp