Elo-indexserver-client

* https://github.com/treskon/elo-indexserver-client/pull/22
* add function to rename a sord

* https://github.com/treskon/elo-indexserver-client/pull/21
* elo_service: change default charset function param to UTF-8 instead of ISO_8859_1

* https://github.com/treskon/elo-indexserver-client/pull/20
* maputils:
* Change the default charset to UTF-8;
* Reading: use the elo db column content_type to automatically convert a bytes array to a string with the given charset

* https://github.com/treskon/elo-indexserver-client/pull/19
* maputils: 'write_map_fields': change fallback behaviour when a value > 255 is stored


Previously if one value was larger all other values were also written as blob.
Patched Version: Only the larger values are written as blobs. Other values are still written as strings.
This results in 2 API calls which reduces performance. However, in a real world scenario the old behaviour was not useful as ELO does not have that fallback build in. So most UIs would show just an empty field, even if the Map Blob field was filled.

* https://github.com/treskon/elo-indexserver-client/pull/18
* maputils: serialize_table, deserialize_table remove table_name parameter as it was a wrong assumption that elo uses best practices

* https://github.com/treskon/elo-indexserver-client/pull/17
* add serialize_map_fields_table and deserialize_map_fields_table: Helper Method to serializes, given the raw elo
map fields, a table like format. The table is represented as a list
of dictionaries, where each dictionary represents a row in the table.
All operations are done in memory and no ELO operations are performed.