  * Changed CLOCK_REALTIME to CLOCK_MONOTONIC for monitoring startup time.
  
  * Fixed bug using filter aggregation. (issue #29)
  
  * Fixed bug in median, median_low and median_high when using on series
    with large values. (issue #30)
    
  * Check for successful memory allocations in cexpr object. 
  
  * Wrap socket around uv_tcp_t instead of two separate mallocs.
  
  * Fixed possible stack overflow error by checking for a max recursion depth 
    when parsing a query. (issue #31)
    
  * Fixed possible stack overflow error by checking for a maximum query length.
    (see issue #32)