Bump version to 0.7

Signed-off-by: Stefan Widgren <stefan.widgren@gmail.com>

Author: stewid

DESCRIPTION

@@ -3,8 +3,8 @@ Title: Provides Access to Git Repositories
 Description: Interface to the libgit2 library, which is a pure C
     implementation of the Git core methods. Provides access to Git
     repositories to extract data and running some basic git commands.
-Version: 0.6.99
-Date: 2015-02-18
+Version: 0.7
+Date: 2015-02-22
 License: GPL-2
 Copyright: See COPYRIGHTS file.
 URL: https://github.com/ropensci/git2r