liblux-v1.0.1

The following changes have been made since v1.0.0:

Manpage changes:
  - The OS specified in the manuals is now set to Linux.
  - lux.h(0) has been moved to the new 3head section yielding
    lux.h(3head).
  - lux.h(3head) uses compact lists for functions.

Makefile/Tup changes:
  - The compiler is no longer invoked with -fomit-frame-pointer as that
    is enabled by default with -O1 or higher.
  - We now compile with -D_GNU_SOURCE to get O_PATH.

Code changes:
  - Minor formatting fixes.
  - Macros are now prefixed with “LIBLUX_”.
  - We no longer check to see if O_PATH is defined, we just assume it
    is.
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