Source code from putty official and add self customization.

• mingw-w64 v4.9.2
• Below source files are updated to adapt to mingw env (already in current repo)
  • align type definition between sshbn.h and _mingw.h
    • typedef __uint64_t BignumInt; -> typedef unsigned __int64 BignumInt;
    • typedef __uint128_t BignumDblInt; -> typedef unsigned __int128 BignumDblInt;
  • update putty.rc, pageant.rc, puttygen.rc, puttytel.rc
    • Solve 64bit version issue: Not involve 32bit manifest putty.mft in 64bit build
    • REF: FauxFaux/PuTTYTray#89
• a new makefile Makefile.mingw (already in current repo)
• In mingw
  • cd putty-src/windows
  • run make -f Makefile.mingw
• NOTE: for building by cygwin, please also follow above steps, except
  • aligin type definition in cygwin
  • remove option -mno-cygwin in Makefile.cyg. It is invalid in latest cygwin
  • run make -f Makefile.cyg

• Add Keyboard hotkeys (session panel -> windown -> behavior)
  • F1: one key clean screen
  • F2: one key copy all
  • F3: duplicate session
  • F4: change current window title
• Add SSH auto login with user name and password
• Add find text

• For login local cygwin
  • puttycyg
    • Project is dead, no longer maintained. The existing code only support cygwin1.5 and cygwin1.7. Now cygwin is going forward...
    • Great project. I even merged its source code to my putty. It can be replaced by cygtermd as describe in below bullet.
  • http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/cygwin-terminal-window.html

• Brian Jiang
• Alan ZHU