Generate labels with pangocairo (#8)

Goal of this PR is to have some basic labels generated with pangocairo
- size of the canvas should be matching the input text and grow/shrink accordingly
- basic formatting options like fontsize and align should be working

Reviewed-on: moritz/ptouch-prnt#8

src/meson.build

@@ -6,19 +6,21 @@ ptprnt_hpps = files (
     'libusbwrap/UsbDevice.hpp',
     'interface/IPrinterDriver.hpp',
     'interface/IPrinterTypes.hpp',
-    'P700Printer.hpp',
+    'printers/P700Printer.hpp',
+    'printers/FakePrinter.hpp',
     'PtouchPrint.hpp',
     'PrinterDriverFactory.hpp',
     'graphics/Bitmap.hpp',
-    'graphics/Image.hpp',
+    'graphics/Label.hpp',
     'graphics/Monochrome.hpp'
 )
 
 ptprnt_srcs = files (
     'PtouchPrint.cpp',
     'PrinterDriverFactory.cpp',
-    'P700Printer.cpp',
-    'graphics/Image.cpp',
+    'printers/P700Printer.cpp',
+    'printers/FakePrinter.cpp',
+    'graphics/Label.cpp',
     'graphics/Bitmap.cpp',
     'graphics/Monochrome.cpp',
     'libusbwrap/UsbDeviceFactory.cpp',