typo bug in complex acos
Fix ulp test with respect to nan and inf
Add missing complexify include in qr
Better fix for ULP on NaN

Use a proper NaN-safe max and add a test for the scenario
in the max_ulp test.
cleaning of hyperbolic generic and adding/updating unit tests for complex impl of hyperbolic
Missing cosnt on static_fft bench reset()
emit error message if using NT2_ASSERTS_AS_EXCEPTIONS with exceptions disabled
add missing extern inline for throw_exception
missing word in error message
Quick-fix for failed gather_includes builds when cross compiling (missing exceptions support).
Applied the same quick-fix to move_reuse and postconfigure as for gather_includes.
(note to nt2 devs: there seems to be duplication between the CMakeLists.txt files for the three tools)
Fixed/updated remaining code affected by the timing code changes.
Added attempts to prevent the compiler and/or the CPU from reordering and/or removing calls to timing functions.
Changed the default time unit to microseconds.
Added and used the priority_booster_t utility class.
Added more todo and implementation notes.
Further improved stability/accuracy of the timing functions overhead (still not "perfect", especially for now()).
Optimized the median<>() function template and (temporarily) moved it into the now.cpp.
Switched to the rand48 PRNG (as it is faster) and (temporarily) moved the reusable PRNG functions into the now.cpp.
Minor other refactoring and stylistic changes.
Created a virtual interface class for benchmarks. Used it to make the perform_benchmark function a non template and (temporarily) moved it to now.cpp.
Used the perform_benchmark(_impl) function in now.cpp to accurately calculate the timing functions overhead (this now produces stable/reproducible results).
Minor CT optimization.
Added "beta"/"prototype" support for GCC's bultin vector type.
Added a workaround for a GCC performance bug related to bultin_unreachable.
Minor other reafactoring and stylistic changes.
Optimized the  dif::dft_8_in_place() member function template (added appropriate implementation notes).
Added more documentation links and resorted some existing ones.
Minor other refactoring, optimizations and stylistic changes.
Minor stylistic changes.
Unrolled the butterfly loope for size 32 transform.
Added a workaround for a MSVC10 optimizer deficiency.
Minor other refactoring and stylistic changes.
Increased the individual FFT benchmark duration from 0.6 to 0.8 seconds.