Migrated to git!

- Added git guide for ZF1
- Updated README, INSTALL, and DEVELOPMENT_README to reflect move to git
  - README indicates origins in subversion
  - README includes directions for both git and subversion, and subversion
    points to old SVN server as well as GitHub URIs
- Updated composer.json to reflect branches available
Made readme a markdown file
Minor markdown style updates
Fixed #67 - Zend_Service_Rackspace_Files::copyObject() no longer overrides Content-Type
Fix composer.json

- Had an extra trailing comma
Merge branch 'hotfix/67' of github.com:kynx/zf1 into kynx-hotfix/67
Merge branch 'kynx-hotfix/67'
Close #71