Bug #18581: "config-get -c" not returning channel's configuration when using alias [dufuz]

Conflicts:
	package-PEAR.xml
	package2.xml
Fixed Bug #18639: regression: installing xdebug fails most likely due to another fix [dufuz]
All System (the class) functions can now take in spaced paths as long as they are surrounded in quotes. Prior to this it was possible to do that by passing all values in as an array (related to #18362, #18440)

Fixed Bug #18362: A whitespace TEMP_DIR path breaks install/upgrade functionality [dufuz]
Fixed Bug #18440: bad tmp folder path on install : Unable to create path for C:/Program/tmp [dufuz]
Add a test for bug #18362 and #18440 - accompanying System::_parseArgs tests
Fixed Bug #17350: "pear install --force" doesn't uninstall files from previous pkg versions [dufuz]

Conflicts:
	PEAR/Installer.php
	package-PEAR.xml
	package2.xml