Fix several issues for Linux around casting SDKManager to concrete class:
mostly with reading devices.xml which Unix does not support. Migrated
ISDKManager#getMinimumSupportedSBSv2Version() to API. Can now import and create Symbian projects.
<?xml version="1.0" encoding="UTF-8"?>
<?eclipse version="3.0"?>
<plugin>
<extension
point="com.nokia.sdt.component.symbian.implementation">
<implementation class="com.nokia.sdt.component.symbian.test.FooImplementationTypeFactory"/>
<implementation class="com.nokia.sdt.component.symbian.test.FooBarImplementationTypeFactory"/>
</extension>
</plugin>