Refactor code into utils, mfapi and mfshell

- utils is the low level library used by the others
 - mfapi uses utils and implements the api and some wrappers
 - mfshell uses mfapi and utils to provide a shell

mfapi/file.h

@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2013 Bryan Christ <bryan.christ@mediafire.com>
+ *               2014 Johannes Schauer <j.schauer@email.de>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2, as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ */
+
+#ifndef __MFAPI_FILE_H__
+#define __MFAPI_FILE_H__
+
+typedef struct  _file_s         file_t;
+
+struct _file_s;
+
+file_t*     file_alloc(void);
+
+void        file_free(file_t *file);
+
+int         file_set_key(file_t *file,const char *quickkey);
+
+const char* file_get_key(file_t *file);
+
+int         file_set_hash(file_t *file,const char *hash);
+
+const char* file_get_hash(file_t *file);
+
+int         file_set_name(file_t *file,const char *name);
+
+const char* file_get_name(file_t *file);
+
+int         file_set_share_link(file_t *file,const char *share_link);
+
+const char* file_get_share_link(file_t *file);
+
+int         file_set_direct_link(file_t *file,const char *direct_link);
+
+const char* file_get_direct_link(file_t *file);
+
+int         file_set_onetime_link(file_t *file,const char *onetime_link);
+
+const char* file_get_onetime_link(file_t *file);
+
+ssize_t     file_download_direct(file_t *file, char *local_dir);
+
+#endif