Refactoring and flexibility changes

* Split game module into game and game_interface
* Move core_lib to corelib
* Move miniwindow to corelib
* Introduce init.lua script for initializing the client, giving much more flexibility
* OTClient is no longer Application derived and is much simpler

init.lua

@@ -0,0 +1,48 @@
+-- this is the first file executed when the application starts
+-- we have to load the first modules form here
+
+-- setup application name and version
+g_app.setName('OTClient')
+g_app.setCompactName('otclient')
+g_app.setVersion('0.4.0_dev')
+
+-- setup logger
+g_logger.setLogFile(g_resources.getWorkDir() .. g_app.getCompactName() .. ".log")
+
+-- print first terminal message
+g_logger.info(g_app.getName() .. ' ' .. g_app.getVersion() .. ' (rev ' .. g_app.getBuildRevision() .. ') built on ' .. g_app.getBuildDate())
+
+-- add modules directory to the search path
+if not g_resources.addToSearchPath(g_resources.getWorkDir() .. "modules", true) then
+    g_logger.fatal("Unable to add modules directory to the search path.")
+end
+
+-- try to add addons path too
+g_resources.addToSearchPath(g_resources.getWorkDir() .. "addons", true)
+
+-- setup directory for saving configurations
+g_resources.setupWriteDir(g_app.getCompactName())
+
+-- load configurations
+g_configs.load("/config.otml")
+
+g_modules.discoverModules()
+
+-- core modules 0-99
+g_modules.autoLoadModules(99);
+g_modules.ensureModuleLoaded("corelib")
+
+-- client modules 100-499
+g_modules.autoLoadModules(499);
+g_modules.ensureModuleLoaded("client")
+
+-- game modules 500-999
+g_modules.autoLoadModules(999);
+g_modules.ensureModuleLoaded("game")
+
+-- addons 1000-9999
+g_modules.autoLoadModules(9999)
+
+if g_resources.fileExists("/otclientrc.lua") then
+    dofile("/otclientrc.lua")
+end