Several style changes
Several style changes

- No need for separate grow_dataset() function (a separate function is also not used in other places)
- Use global BLOCK_SIZE value instead of DATASET_BLOCK_SIZE
- Provide the short doxygen function description immediately after the '/**'
- Don't put non-invariant code inside an assert(): hashtable_add_name() needs to be called outside the assert()

stcorp/harp,stcorp/harp,stcorp/harp,stcorp/harp,stcorp/harp,stcorp/harp