Fix typos
Fix a silent-fail case
avoid warning in postgres log file.
Avoid the third warning message
remove unused argument
test save/restore of UTF-8 strings as well.
Merge pull request #457 from linas/master

Assorted minor postgresql cleanups
Add examples documentation
Rename one of the examples directories
Remove an example; we don't want anyone to do this.

The example is written in a style that no one should be emulating.
I don't want to see anyone copying this, and writing code like this.
Its an "example", not a "sample"

In English, the word "sample" means somthing else...
Add documentation for the agent
make the example agent do something
Add a missing carriage return
Bug fix: the stop-agents command was not working.
expand the agents example
Don't debug trace
Remove the server example

We do NOT qant to encourage *anyone* to derive from the cogserver class,
This leads to huge headaches when there are multiple classes that have
derived from it; they can no longer be combined, and end up with conflicting
and duplicated functions.  See the embodiment code, as an example of how
bad this can get.
Minor README cleanup.
Merge pull request #458 from linas/master

cleanup examples, provide documentation