In CegoAction, make the following distribution ready
- show systemspace
- check index
- create, list set, drop counter
Manage append mode also for distributed queries
Idea : With session request append mode is set up
    
- user management with new role concept should be adapted for distributed mode
- serial protocol must be adapted for distributed mode

- Tableset import : allow tableset a to be imported as tableset b ( different names ) 

- expand system tables to show more information abuout keys, add information for checks
     
- 26.04.2015 : Think about index columns to adress column oriented table requirements
Instead of column based table structure, index columns are addd to a row oriented table
as additional columns. For the addintional columns, AVL or btree index structures are used.
There still seems some referencing issues with this design ...
As an alternative, introduce rowcache objects, where special objects with a reduced column set could be cached ( to improve performance for column aggregation for big tables )

- Code cleanup : Improve debug messages, more comments for tricky algorithm in code ...

- Check for persistent pages ( long running load tests have reduced persistent pages from 30 to 27 )
- Check CPU load for select system call ( FreeBSD )
- Introduce bufferpool system table $bufferpool to allow queries on buffer pool data
- Introduce fulltext search ( where contains ... ) 
- Introduce partitioned tables ( for parallel export / import )

