* include/sytles/*.css: Updated "gif" references to the "png" refs.
* include/language/language_en.php: Updated text.
* images/*: Removed near all .gif files and created .png
* operation/*.php, godmode/*.php, *.sql:
Updated gif references to .png
* install.php: Added feature request 1744237
* index.php, operation/agentes/exportdata.php: Moved calendar jscript
from index to exportdata
git-svn-id: https://svn.code.sf.net/p/pandora/code/trunk@546 c3f86ba8-e40f-0410-aaad-9ba5e7f4b01f
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