a minimal gladevcp example - three HAL widgets

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To run independently:
$ gladevcp hw.ui

To connect the button HAL pin to the LED, run as:

$ gladevcp -H hw.hal hw.ui

To embed this application as a tab into Axis or Touchy, copy hw.ui and hw.hal to your config directoy,
and edit your Axis/Touchy ini file as follows:

[DISPLAY]
EMBED_TAB_NAME = HelloWorld
EMBED_TAB_COMMAND = gladevcp -H hw.hal -w {XID} hw.ui

to edit the user interface:

$ glade hw.ui