fix simple typo (s/you/your/)
make datagridview columns sortable

- this uses the SortableBindingList<T> class from
  http://betimvwframework.codeplex.com/ (Apache 2.0 license)
  to wrap the existing List<ProjectModel> and allow sorting
Merge branch 'patch-1' of git://github.com/jamesmanning/TargetFrameworkMigrator into jamesmanning-patch-1
Merge branch 'jamesmanning-patch-1'
Merge branch 'sortable-datagridview-columns' of git://github.com/jamesmanning/TargetFrameworkMigrator into jamesmanning-sortable-datagridview-columns
prevent adding rows in grid
Merge branch 'jamesmanning-sortable-datagridview-columns'
update version to 1.5