Actors and genre edit

Implemented widgets for actor and genre editing of movies. Created new
MappingTableWidget for both genres and actors and revamped
ArchiveTreeView to show 2 widgets below the FilesTreeView separated by a
splitter.

While testing the new setup several bugs were fixed:
-an SQL syntax error in FilesTreeModel
-fixed SmModelSingleton to properly work with table names

I also changed the signature of MappingTableModel::addMapping for the
ease of use and added MappingTableModel::removeMapping.
MappingTableModel got 2 new convenience functions:
1. bool contains(QString) to check if an item is already present
2. QModelIndex find() to get the index of a specific value from the
model.

1 files changed, 4 insertions, 2 deletions

diff --git a/shemov.pro b/shemov.pro
index 60bc419..6d54047 100644
--- a/shemov.pro
+++ b/shemov.pro
@@ -54,7 +54,8 @@ SOURCES = main.cpp \
     seriestreemodel.cpp \
     filestreemodel.cpp \
     filestreewidget.cpp \
-    mappingtablemodel.cpp
+    mappingtablemodel.cpp \
+    mappingtablewidget.cpp
 HEADERS = listitem.h \
     listmodel.h \
     movieitem.h \
@@ -104,6 +105,7 @@ HEADERS = listitem.h \
     seriestreemodel.h \
     filestreemodel.h \
     filestreewidget.h \
-    mappingtablemodel.h
+    mappingtablemodel.h \
+    mappingtablewidget.h
 LIBS += -lmagic
 RESOURCES = shemov.qrc