Add Pixelmator template
Update usage documentation
Clean up LCDMaker layout
StatusBar can subscribe to relevant parameters

Rather than subscribing to all parameters in the set, a method is now
added to allow the status bar to find parameters and subscribe them
selectively. This improves the performance of onParameterUpdated(), and
also requires only one method to be called in the GUI constructor.

Additionally, this change fixes an issue where the order of
initialization would cause bugs if the StatusBar were not the last
component added.
Tighten spacing around status bar
Background for new demo app
Components do not send notifications in setValue

This was causing the values set from PluginParameters to be set by the Juce
default values, resulting in the wrong default parameter values.
Minor cleanups
More interesting demo app

Actually looks nice now, with a real background and everything! Also
there are more controls, there is one per PluginParameter type.
IndicatorLight pulses when receiving VoidParameter
StatusBar shows VoidParameter, too

Why the hell not?
Bump PluginParameters submodule
Add a gentle fade to push button state change
Move animations constants to single file
Add usage documentation to all classes

Fixes issue #2.