Log Message:
Update to 2.7.2 from 2.4.0

* Use custom BSDmakefile instead of luarocks.
  It seems that luarocks lacks destdir support.

Changelog:
2013-01-08  Release 2.7.2

  * Fixed the use of alternative allocators, and a memory leak.
  * Simplify the build system further.
  * Change rockspec to build from git now that github no longer
    supports downloads.

2012-10-18  Release 2.7.1

  * Fixed Lua 5.1 compatibility, broken in 2.7.0.
  * Added ability to specify no replacement to gsub with a nil or
    false replacement argument.

2012-10-04  Release 2.7.0

  * Added support for searching raw memory buffers (e.g. made with
    alien).
  * Fixed possible invalid code generation in C (thanks, Michael
    Tautschnig).
  * Generate LuaRock rockspecs for all modules.
  * Greatly simplify UNIX build system, relying on LuaRocks.
  * Allow POSIX REG_STARTEND to be used on any system supporting it.
  * Add a test set for POSIX regex engine (thanks, Enrico Tassi).
  * Simplify some code.
  * Always use Lua state memory allocator.

2012-04-13  Release 2.6.0

  * Added support for Lua 5.2.

2010-12-15  Release 2.5.3

  * Bug fix to rex.split.
  * Support for new flags in PCRE 8.11.

2010-11-10  Release 2.5.2

  * Important bug fix (thanks to Enrico Tassi for the report)
    affecting platforms with certain alignment requirements.
  * Improved build system for Windows.
  * Minor improvements to the manual.

2010-10-04  Release 2.5.1

  * Minor improvements and fixes, no changes to library code.

2010-10-03  Release 2.5.0

  * Added bindings of the TRE and GNU regex APIs.

  * Improved and simplified the build system.