don't try and escape nulls, which leads to dangling x values. fixes Sourceforge Bug ID: 3579602.
Fix queries reading pg_shdescription

These queries need to be classoid qualified, so they work when there
are multiple objects with the same oid but of different classes.
(Which can always happen, but is a lot more likely to happen after
a cluster has been pg_upgrade'd)
Fix an issue with population of FK fields using autocomplete.

The fix comes from a comment by Dmytry Scherbina in a pull request
originally submitted by Jakob Klein.
Merge pull request #9 from xzilla/master

fix problem with autocomplete on text FK fields
Update DEVELOPERS file with information about git repository
Fix multiple bugs related to GPC parameters pollution from code

Was introduced by me in e1a5b9c54f3ea112a0ce5b2f0f3a0ace9583a354 while
trying to make parameter more plugin friendly. display.php code default
code use a defined set of GPC parameter and make them persitent between
two call (while paging or sorting data). Any other parameter is ignored
and doesn't survive a new call. This patch attempted to make plugin
specific GPC parameters persistants, but was making ALL parameters
persitants, introducing a bunch of bug.

This one revert part of this previous patch but keep the small
house-cleaning.
add README file for Reports plugin with brief explanation of functionality
Small correction in Report plugin README file
supress potential "Undefined index" notices
Fix navlinks when browsing results from a Report

Navlinks hadn't report related parameters set. So when clicking on
expend/collapse or refresh, the link just ignores we where browsing a
report result set. In consequence, the trail and navlinks in the printed
page where broken.
Fix a PHP warning about "Undefined index"

We must keep track of the nohistory parameter between each call of
display.php.