Dynamic linking 0.28

Author: ocanty

git_dynamic.go

@@ -6,8 +6,8 @@ package git
 #include <git2.h>
 #cgo pkg-config: libgit2
 
-#if LIBGIT2_VER_MAJOR != 0 || LIBGIT2_VER_MINOR != 27
-# error "Invalid libgit2 version; this git2go supports libgit2 v0.27"
+#if LIBGIT2_VER_MAJOR != 0 || LIBGIT2_VER_MINOR != 28
+# error "Invalid libgit2 version; this git2go supports libgit2 v0.28"
 #endif
 
 */