improve import capabilities from a submodule

The capabilities are now imported as a submodule from
mike42/escpos-printer-db
fixes #174

.gitignore

@@ -5,6 +5,7 @@
 $~
 .idea/
 .directory
+.cache/
 
 # temporary data
 temp

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "capabilities-data"]
+	path = capabilities-data
+	url = https://github.com/mike42/escpos-printer-db.git

MANIFEST.in

@@ -3,6 +3,7 @@ include *.txt
 include COPYING
 include INSTALL
 include tox.ini
+include capabilities-data/dist/capabilities.json
 recursive-include doc *.bat
 recursive-include doc *.ico
 recursive-include doc *.py

capabilities-data

@@ -0,0 +1 @@
+Subproject commit 8744f9397ef6b58aee502aa75ac1efad31c9f5d7

setup.py

@@ -72,7 +72,7 @@ setup(
     author='Manuel F Martinez and others',
     author_email='manpaz@bashlinux.com',
     maintainer='Patrick Kanzler',
-    maintainer_email='patrick.kanzler@fablab.fau.de',
+    maintainer_email='dev@pkanzler.de',
     keywords=[
         'ESC/POS',
         'thermoprinter',

src/escpos/capabilities.json

@@ -0,0 +1 @@
+../../capabilities-data/dist/capabilities.json