CMSIS-DSP 1.16.2

• Improvements to documentation
• Added arm_fir_decimate_f64
• Removed some gcc workarounds that are no more needed for Helium
• Removed redundant test in arm_atan2_q15 and arm_atan2_q31
• Replaced INFINITY by maximum positive float
• Replaced hex constants with 2's complement equivalents
• Added C++ template extension (outside of pack - headers available from github repository)
• Added new compilation defines (ARM_DSP_ATTRIBUTE, ARM_DSP_TABLE_ATTRIBUTE and ARM_DSP_CUSTOM_CONFIG)
• Solved several github issues
• Corrected wrong version number in pack for v1.16.0
• Corrected issue #201 in v1.16.1 (related to new ARM_DSP_ATTRIBUTE)