remove /*=false*/ comments

Command used:
    sed -r -i 's|/\*=false\*/||g' "$file"
remove /*=true*/ comments

Command used:
    sed -r -i 's|/\*=true\*/||g' "$file"
remove /*=""*/ comments

Command used:
    sed -r -i 's|/\*=""\*/||g' "$file"
Merge pull request #129 from toxeus/removeTrueComments

Remove true comments
Replace constants.h with buildsystem defines
cmake: Replace Windows specific if(MSVC) with if(WIN32)