Elo-indexserver-client

* https://github.com/treskon/elo-indexserver-client/pull/27
* https://github.com/treskon/elo-indexserver-client/pull/28

Further improvements to the user_util contains now the following functions:
* get_user_base
* get_user_details
* get_group_base
* get_group_details
* create_user
* create_group
* update_user_details
* update_group_details

also two convenience functions to get add user to group and remove user from group
* user_add_to_group
* user_remove_from_group

* https://github.com/treskon/elo-indexserver-client/pull/26
* add user_util and function get_user_base

* https://github.com/treskon/elo-indexserver-client/pull/25
* file_util set sord.type in addition to mimetype

* https://github.com/treskon/elo-indexserver-client/pull/24
* change behaviour when setting the mimetype in upload_file and update_file for image/jpeg. ELO wants image/jpg instead of image/jpeg

* https://github.com/treskon/elo-indexserver-client/pull/23
* add function to add a reference