Item8875: Multiple issues with new Package.pm installer

• Package.pm is missing from the MANIFEST
• With multiple recursive dependencies, only the last one is reported in the install log.
• Duplicate dependencies and plugins are passed back for reporting. Should use hash instead of list. See below example of duplicated CPAN Dependencies.
• JQuery Plugin directory is also reported as a Plugin - JQueryPlugin/Plugin in below example.
• die statement in Package.pm should be less disruptive.
• Dependencies were installed multiple times. (If a package with a large number of dependencies, such as NatSkin had dependencies which in turn had overlapping dependencies, they were installed multiple time. Added a check to not install a dependency if it checks okay just prior to install. (Note in below example, JQueryPlugin was installed 8 times.
• simulate (inactive) option was inadvertently dropped
• pre/post install routines were being executed when tested if defined.
  • Removed test because they should always be defined even if empty for correctly packaged extensions.
• Duplicated output for Skin installations that did not also install a Plugin module.
• File copy/move errors (such as a write protected directory) are not detected.

Warning: CPAN dependencies were detected, but will not be automatically installed by the Web installer. The following dependencies should be manually resolved as required.

BerkeleyDB
BerkeleyDB

Note: Before you can use newly installed plugins, you must enable them in the "Plugins" section in the main page.

BreadCrumbsPlugin 
FilterPlugin 
FlexWebListPlugin 
IfDefinedPlugin 
SetVariablePlugin 
UploadPlugin 
JQueryPlugin 
JQueryPlugin/Plugin 
NatEditPlugin 
JQueryPlugin 
JQueryPlugin/Plugin 
SetVariablePlugin 
UploadPlugin 
JQueryPlugin 
JQueryPlugin/Plugin 
RenderPlugin 
DBCachePlugin 
JQueryPlugin 
JQueryPlugin/Plugin 
NatSkinPlugin 
BreadCrumbsPlugin 
FilterPlugin 
FlexWebListPlugin 
IfDefinedPlugin 
SetVariablePlugin 
UploadPlugin 
JQueryPlugin 
JQueryPlugin/Plugin 
NatEditPlugin 
JQueryPlugin 
JQueryPlugin/Plugin 
SetVariablePlugin 
UploadPlugin 
JQueryPlugin 
JQueryPlugin/Plugin 
RenderPlugin 
DBCachePlugin 
JQueryPlugin 
JQueryPlugin/Plugin 
RenderPlugin