Renaming

This MR is supposed to fix issue #47 by applying the suggestion of renaming discussed and a little more. Here is a summary of the filename changes:

In include directory:

• morse.h => chameleon.h
• chameleon/chameleon_config.h.in stays as it is
• chameleon/morse_zc.h => chameleon/chameleon_zc.h with all mixed-precision routines
• chameleon/morse_z.h => chameleon/chameleon_z.h with all single precision routines
• chameleon/morse_constants.h => chameleon/chameleon_constants.h for all Chameleon constants
• chameleon/morse_fortran.h => chameleon/chameleon_fortran.h for wrappers of CHAMELEON_... routines only
• chameleon/morse_simulate.h => chameleon/chameleon_simulate.h might be integrated in chameleon.h
• chameleon/morse_struct.h => chameleon/chameleon_struct.h for CHAMELEON structures (descriptors, context)
• chameleon/morse_types.h => chameleon/chameleon_types.h
• chameleon/morse_runtime.h => runtime.h
• chameleon/morse_struct.h => runtime/runtime_struct.h for RUNTIME structures (context, sequence, options)
• chameleon/morse_kernels.h => Integrated into chameleon_tasks.h
• chameleon/morse_tasks.h => chameleon/chameleon_tasks.h
• chameleon/morse_tasks_z.h => chameleon/chameleon_tasks_z.h
• chameleon/morse_tasks_zc.h => chameleon/chameleon_tasks_zc.h

Regarding the functions and structures:

• Everything related to the RUNTIME API (except the tasks) becomes RUNTIME_ something
  • This includes RUNTIME_sequence_t, RUNTIME_request_t and RUNTIME_option_t that were called MORSE_xxxx
  • MORSE_TASK_xxx becomes InsertTask_xxxx to remove the MORSE keyword, and not put the RUNTIME one, but any other suggestion is more than welcome
• All MORSE_ functions become CHAMELEON_
• The same for all structure related to Chameleon, except morse_desc_t that become matrix_desc_t in an attempt to be generic.

All, and especially those involved in #47 discussions (@sylvand, @ltaief, @agullo, @fpruvost, @thibault, @furmento) please have a look and comment directly in the code on the web interface to start discussions where it's needed. I would like to close this issue as soon as possible, so we can definitely move towards the 1.0.0. Thanks.