Singularity path

[zktuong]

If igblast and blast are installed via conda, it can interfere with singularity's attempt to call the right version of the software as the local conda bin path is appended to the front of the container's $PATH whenever the singularity image is mounted.

The current work around is unfortunately not to install igblast and blast via conda, but managed separatedly and exporting to $PATH locally, if the singularity container is also used.