#1 fdRead() vs. objRead() parameters

[Greg Beeley]

There is a confusion in parameter order between these
two functions. While they perform different kinds of
tasks, a few modules are designed to take either one.
The last two parameters, seek offset and flags, need to
be consistent.

To fix: Reverse the order of those parameters for
objRead and for objWrite.

Affected files:
- obj.h and obj_content.h
- anything explicitly calling objRead or objWrite
- anything that takes either fdRead or objRead as a
param.