Issue #66 Add support for Composer

[7ochem]

Commit:

• 0580bfd Added composer.json with all necessary info and added modman file for deployment into a Magento project. Untested.

Tested on own fork with a blank Magento project:

$ composer require
Search for a package []: segmentio/analytics-magento
Enter the version constraint to require (or leave blank to use the latest version) []: dev-add/composer
Search for a package []: 
./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)                                                  
  - Installing segmentio/analytics-magento (dev-add/composer 0580bfd)
    Cloning 0580bfd72eaf3f33aa98bac3ad06eb2067b805d9

Writing lock file
Generating autoload files

Project's composer.json:

"require": {
    "segmentio/analytics-magento": "dev-add/composer"
},  
"repositories": [
    {   
        "type": "git",
        "url": "https://github.com/7ochem/analytics-magento.git"
    }
],

Project's .gitignore file updated:

#segmentio/analytics-magento
/app/etc/modules/Segment_Analytics.xml
/app/code/community/Segment/Analytics
/app/design/adminhtml/default/default/template/segment_analytics
/app/design/frontend/base/default/template/segment_analytics

[sperand-io]

@7ochem if you think this still looks okay, I can take you're word for it, as it's just manifest stuff. :)

If so, I'm happy to merge! Thanks so much.