New mql4 support

Changes:

  * MQL4 ``string`` is now ``wchar_t*`` equivalent, so changed ``sqlite_*`` functions from ``char*`` to ``wchar_t*``
  * Added ``sqlite_initialize`` and ``sqlite_finalize`` to dll, to hold/free the terminal data path.
  * Added ``sqlite_init`` to ``sqlite.mqh``
  * Changed sample scripts to CRLF formatted because new MetaEditor fails to compile if line encoding mixed up with CRLF and LF.
  * Changed file structure to make user easy to deploy.
  * Changed makefile but mq4 compilation does not work correctly, because include dir incorrect in command line (not seeing TERMINAL_DATA_PATH)