- new version V1.5.5
 - reworked DSP library source files
     added macro ARM_MATH_LOOPUNROLL
     removed macro UNALIGNED_SUPPORT_DISABLE
     relpaced arm_bitreversal2.S with C version
     added const-correctness
     replaced SIMD pointer construct with memcpy solution
 - reworked DSP library documentation
 - moved DSP libraries to folder ./DSP/Lib
 - ARM DSP Libraries are built with ARMCLANG
 - Added DSP Libraries Source variant