Add classic copy/paste to Linux and Win32 keymaps

For issue:  "Paste via Shift+Insert not working (Windows)" #2546
This has been added to the linux and win32 keymaps.

:memo: 

    Ctrl+Insert: Copy
    Shift+Insert: Paste

![image](https://cloud.githubusercontent.com/assets/7287076/3217351/9eef6c88-efde-11e3-9e26-3e04d7b06bac.png)