#19 pkgconfig files not working

[Fnoop]

Installed <aruco_install>/lib/pkgconfig/aruco.pc doesn't work for files installed into a custom directory.
Following lines should be changed:</aruco_install>

Version:  @VERSION@
Requires: 
Libs: -l@PROJECT_NAME@

to

Version: @PROJECT_VERSION@
Requires: opencv >= 2.1.0
Libs: -L${libdir} -l@PROJECT_NAME@

[Rafael Munoz-Salinas]

changed in git repo