Update ErrorCodes

Author: oblivioncth

README.md

@@ -121,13 +121,14 @@ Once stex has finished executing an exit code is reported that indicates the "er
 | 1     | INVALID_ARGS       | The arguments provided were not recognized or were formatted incorrectly |
 | 2     | NO_INPUT           | The required input directory was not provided                            |
 | 3     | NO_OUTPUT          | The required output directory was not provided                           |
-| 4     | INVALID_INPUT      | The provided input directory was invalid                                 |
-| 5     | INVALID_OUTPUT     | The provided output directory was invalid                                |
-| 101   | INVALID_FORMAT     | The provided pixel format was invalid                                    |
+| 4     | INVALID_INPUT      | The provided input directory is invalid                                  |
+| 5     | INVALID_OUTPUT     | The provided output directory is invalid                                 |
+| 101   | INVALID_FORMAT     | The provided pixel format is invalid                                     |
 | 102   | NO_IMAGES          | The provided input directory contains no images                          |
-| 103   | CANT_READ_IMAGE    | Failed to read an input image                                            |
-| 104   | CANT_WRITE_ATLAS   | Failed to write the output atlas                                         |
-| 105   | CANT_WRITE_KEY     | Failed to write the output atlas key                                     |
+| 103   | DUPLICATE_NAME     | The provided input directory contains images with the same basename      |
+| 104   | CANT_READ_IMAGE    | Failed to read an input image                                            |
+| 105   | CANT_WRITE_ATLAS   | Failed to write the output atlas                                         |
+| 106   | CANT_WRITE_KEY     | Failed to write the output atlas key                                     |
 | 201   | CANT_READ_KEY      | Failed to read the input atlas key                                       |
 | 202   | ATLAS_DOESNT_EXIST | The TEX file specified within the input atlas key could not be found     |
 | 203   | CANT_READ_ATALAS   | Failed to read the input atlas                                           |