Call parentRenderer with correct context
Merge pull request #179 from sweco-sebhar/ext411a-fix

Call parentRenderer with correct context (r=@bartvde)
Remove global variable leakage.
Merge pull request #181 from marcjansen/global

Remove global variable leakage. (no formal review)
Prevent unchecking of radio button in tree
Upgrade loader to point to Ext 4.2.1
Upgrade example to use Ext 4.2.1/OL 2.13
Upgrade example to use Ext 4.2.1/OL 2.13
Upgrade example to use Ext 4.2.1/OL 2.13
Upgrade example to use Ext 4.2.1/OL 2.13
Upgrade example to use Ext 4.2.1/OL 2.13
Upgrade example to use Ext 4.2.1/OL 2.13
Upgrade example to use Ext 4.2.1/OL 2.13
Upgrade example to use Ext 4.2.1/OL 2.13
Upgrade example to use Ext 4.2.1/OL 2.13
Upgrade example to use Ext 4.2.1/OL 2.13
Upgrade example to use Ext 4.2.1/OL 2.13
Upgrade example to use Ext 4.2.1/OL 2.13
Upgrade example to use Ext 4.2.1/OL 2.13
Upgrade example to use Ext 4.2.1/OL 2.13