Release version: 2.1.0

Feature: -K (capital k), reads key from the stdin. This way your key will not get saved to the terminal history. The old option is still present and is backwards compatable with old .3 files.

Release version: 2.0.1

BUG FIX: Linux incompatability resolved. typedef _int32 uint32_t should be typedef unsigend _int32 uint32_t.
Breaks backward-file compatability in Windows.

BUG FIX: _O_BINARY flag is needed to prevent _write and _read to interpret CTRL+Z and end of file.

Runs in Microsoft Windows. In Windows, build using build.bat
BUG: Files encrypted in Linux is not getting decrypted properly in Windows and vice versa.

Change: -D now works for both encryption and decryption. Deletes source files if operation was successful.
Change: Usage information changed to mention the above point.

BUG #0001 FIXED: On read/write error, in encrypt_decrypt () routine, perror () did not display the error code. Resolution: close () before perror ().
BUG #0002 FIXED: With -D option, file got deleted, even when Encryption failed. Resolution: Checked the result of encrypt_decrypt before deletion.
Feature: Verbosity development complete.
Usage changed: -v option.
Code formatting changes in main.c and tea.c
Added CHANGES.md file to keep track of the changes in versions.