Release 0.185

Fix excessive CPU usage in coordinator for queries that have large string literals containing non-ASCII characters.
Fix incorrect ordering when the same field appears multiple times with different ordering specifications in a window function ORDER BY clause. For example: OVER (ORDER BY x ASC, x DESC).
Do not allow dropping or renaming hidden columns.
Improve performance of joins where the condition is a range over a function. For example: a JOIN b ON b.x < f(a.x) AND b.x > g(a.x)
Improve performance of certain window functions (e.g., ) with similar specifications.
Add cast from JSON to ROW.

Improve ORC reader efficiency by only reading small ORC streams when accessed in the query.
Improve RCFile IO efficiency by increasing the buffer size from 1 to 8 MB.
Fix native memory leak for optimized RCFile writer.