[AS7-4083] Added channel metrics.
[AS7-4083] Added protocol metrics.
[AS7-4083] Added protocol metric descriptions and channel attributes.
Adjust names for correct use of ResourceDefinition and Resource. Also changes for i18n.
[AS7-4083] Adjust management API version to 2.0.0.
[AS7-4083] Fix i18n and copyright text issues.
[AS7-4083] Fix issue with navigation to a non-existent channel.
[AS7-4083] Fix null-channel issue.
Undertow subsystem - new configuration format
Move undertow subsystem package under new name
Move IO subsystem package under new name
Fix xsd test to include wildfly schemas
Initial implementation of filters
Fix/add copyright headers
WFLY-920 Module Service Dependencies do not take transitive dependencies into account

Add multi-stage resolution process to make sure that all dependent module spec
services are up before starting the module service.
Change the error pages from http://localhost:9990/error/**** to As 8 and wilfdFly logo
change layout a bit & sync style with welcome content

- optimize images for web
WFLY-469 Small fix for EL 3 support.
WFLY-1323 Treat extension add ModuleNotFoundException differently from other types of ModuleLoadException
WFLY-886 BZ 961273 - Fix subsystem version registration