mx6ulexceet-s: add vcnl4010 support to web demo and enable wifi AP

recipes-core/images/image-exceet-base.bb

...re/init-ifupdown/init-ifupdown/imxceet-ul-2-xs/interfaces

recipes-core/netbase/netbase/imxceet-ul-2-xs/hosts

recipes-core/netbase/netbase_%.bbappend

recipes-exceet/demoserver/demoserver_0.1.bb

recipes-exceet/demoserver/files/web/getValues.php

recipes-exceet/demoserver/files/web/index.html

recipes-extended/lighttpd/lighttpd/lighttpd.conf

.../linux/linux-imx-exceet-3.14.38/imxceet-ul-2-xs/defconfig

recipes-support/dnsmasq/dnsmasq_%.bbappend

recipes-support/dnsmasq/files/dnsmasq.conf