Invalid attribute width inside <tr> and additionally obsolete attributes

An invalid attribute within <tr> was found. In addition, I removed several attributes which its use is discouraged in HTML5.
First draft of adding event to allow dynamic commercial updates and
installs
Simplified version, always fire onInstallerBeforeDownloadPackage event
before downloading a package
Even simpler, removed unused params
Restored mistakenly removed comments from original Joomla! code
Merge branch 'staging' into auth_update
Query-fix in com_content article modal

This change prevents the query from being executed when the value is 0. There is never an article with ID 0 and especially when there are more than one modal select per page, you have several unnecessary queries.
Merge remote-tracking branch 'joomla-cms/staging' into auth_update
Check if $module is an object

Fixing the
> Creating default object from empty value in /.../libraries/cms/module/helper.php on line 163

warning if `JModuleHelper::renderModule` is called without a proper module object.
Adding checks for properties and logging the error.
Update warnings.php

Extension Manager should not display a warning about PHP memory limit if memory_limit is set to -1
http://joomlacode.org/gf/project/joomla/tracker/?action=TrackerItemEdit&tracker_item_id=33230
Update default.php

Very tiny change to hide "Print"-button in prints
Fixing codestyle
Fixing codestyle
Fix "Error displaying the error page: Application Instantiation Error" Error
Update to TinyMCE 4.0.16
fix for Notice: Undefined variable: nowDate

http://joomlacode.org/gf/project/joomla/tracker/?action=TrackerItemEdit&tracker_item_id=33248&start=8425
Improving Contact modal field
Improving Categories modal field
Improving Newsfeeds modal field