executable has new name, without .bin, so update readme and gitignore

new name is xrandr-invert-colors instead of xrandr-invert-colors.bin

Author: zoltanp

.gitignore

@@ -1,4 +1,5 @@
 *~
 *.bin
 *.o
+xrandr-invert-colors
 

README.md

@@ -22,15 +22,15 @@ Execute `sudo make install` after build to put the binary in the following locat
 
 Using
 -----
-Run `xrandr-invert-colors.bin` for inverting colors on all screens.
+Run `xrandr-invert-colors` for inverting colors on all screens.
 The follwing program option is implemented:
 
 * `-s <crtc_number>` : Instead of inverting all screens, invert only the colors of the screen identified by `<crtc_number>`.
 * `--help` and `-h` : Print a short help for the program.
 * `--version` : Print a (dummy) version information.
 * `-d` : Enables debug log on standard output. Prints diagonstic messages.
 
-Hint: put the executable in the a directory listed in $PATH, and bind the execution of `xrandr-invert-colors.bin` to a shortcut key.
+Hint: put the executable in the a directory listed in $PATH, and bind the execution of `xrandr-invert-colors` to a shortcut key.
 
 
 Achknowledgements