add PIString::lineNumber() method

add ""_tr literal to translate string by PITranslator
add pip_tr util, now useless, only can generate *.ts
add qt_support internal lib, now only works with *.ts file
pip_vtt migrate to qt_support

utils/translator/CMakeLists.txt

@@ -0,0 +1,16 @@
+list(APPEND PIP_UTILS_LIST "pip_tr")
+set(PIP_UTILS_LIST ${PIP_UTILS_LIST} PARENT_SCOPE)
+import_version(pip_tr PIP)
+set_deploy_property(pip_tr
+	LABEL "PIP Translator"
+	FULLNAME "${PIP_DOMAIN}.pip_tr"
+	COMPANY  "${PIP_COMPANY}"
+	INFO "Platform-Independent Primitives")
+make_rc(pip_tr _RC)
+add_executable(pip_tr "main.cpp" ${_RC})
+target_link_libraries(pip_tr pip_qt_support pip)
+if (DEFINED LIB)
+	install(TARGETS pip_tr DESTINATION ${CMAKE_INSTALL_PREFIX}/bin)
+else()
+	install(TARGETS pip_tr DESTINATION bin)
+endif()