Moved some parts to a static lib so both the executable and the tests can link to it.

Written additional tests.

core/core.pro

@@ -0,0 +1,43 @@
+#-------------------------------------------------
+#
+# Project created by QtCreator 2017-02-26T10:51:14
+#
+#-------------------------------------------------
+
+QT       -= gui
+
+TARGET = core
+TEMPLATE = lib
+CONFIG += staticlib c++11
+
+INCLUDEPATH += C:\prog\include C:\VSproj\boost_1_63_0
+DEFINES += WIN32_LEAN_AND_MEAN NOMINMAX
+LIBS += /LIBPATH:C:\VSproj\boost_1_63_0\stage\lib /LIBPATH:c:\prog\lib\ libpq.lib fmt.lib User32.lib ws2_32.lib
+
+
+# The following define makes your compiler emit warnings if you use
+# any feature of Qt which as been marked as deprecated (the exact warnings
+# depend on your compiler). Please consult the documentation of the
+# deprecated API in order to know how to port your code away from it.
+DEFINES += QT_DEPRECATED_WARNINGS
+
+# You can also make your code fail to compile if you use deprecated APIs.
+# In order to do so, uncomment the following line.
+# You can also select to disable deprecated APIs only up to a certain version of Qt.
+#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
+
+SOURCES += Core.cpp \
+    my_boost_assert_handler.cpp \
+    SqlLexer.cpp \
+    PasswordManager.cpp \
+    CsvWriter.cpp
+
+HEADERS += Core.h \
+    PasswordManager.h \
+    SqlLexer.h \
+    ScopeGuard.h \
+    CsvWriter.h
+unix {
+    target.path = /usr/lib
+    INSTALLS += target
+}