Update: Next micro version (0.6.16).

Update: Next micro version (0.6.16).

The following are the commands that I ran to make this change:
  # find build/ level_? specifications/ documents/ licenses/ -type f -exec sed -i -e 's|0\.6\.15|0.6.16|g' -e 's|^version_micro 15|version_micro 16|g' '{}' ';'
  # find level_3/ -name common.h -exec sed -i -e 's|_program_version_micro_s F_string_ascii_1_s F_string_ascii_5_s|_program_version_micro_s F_string_ascii_1_s F_string_ascii_6_s|g' -e 's|_program_version_micro_s_length (F_string_ascii_1_s_length + F_string_ascii_5_s_length)|_program_version_micro_s_length (F_string_ascii_1_s_length + F_string_ascii_6_s_length)|g' '{}' ';'
  # sed -i -e 's|version_micro 15|version_micro 16|g' build/*/settings build/stand_alone/*.settings level_*/*/data/build/*settings*