Added support for database maintenance. Added core plugin.

core/core.pro

@@ -4,7 +4,7 @@
 #
 #-------------------------------------------------
 
-QT       += widgets
+QT       += widgets sql
 
 TARGET = core
 TEMPLATE = lib
@@ -18,7 +18,8 @@ SOURCES += \
     transaction.cpp \
     emptystringvalidator.cpp \
     data/role.cpp \
-    data/permission.cpp
+    data/permission.cpp \
+    coreplugin.cpp
 
 HEADERS += core.h\
         core_global.h \
@@ -34,7 +35,8 @@ HEADERS += core.h\
     emptystringvalidator.h \
     data/role.h \
     data/permission.h \
-    data/core-data.h
+    data/core-data.h \
+    coreplugin.h
 
 unix {
     target.path = /usr/lib
@@ -45,3 +47,9 @@ ODB_FILES = core/data/core-data.h
 
 H_DIR = $$PWD/data/*.h
 include(../odb.pri)
+
+RESOURCES += \
+    rc.qrc
+
+DISTFILES += \
+    metaData.json