Added new startup scripts that don't blast existing ISIS environment … (#3927)

#!/bin/csh

################################################################################

# This file should be sourced within your current shell using the "source"

# command.

#

# On the command line type:

# > setenv ISISROOT ????

# > source isis3Startup.csh

#

# Replace the "????" in the above command line with the path you installed

# the Isis distribution

#

################################################################################

if ($?ISISROOT == 0) then

  echo "ISISROOT environment variable is not set"

  exit 1

endif

if ($?ISISDATA == 0) then

  if (-d $ISISROOT/../data) then

    setenv ISISDATA $ISISROOT/../isis_data

  else

    setenv ISISDATA /usgs/cpkgs/isis3/isis_data

  endif

endif

if ($?ISISTESTDATA == 0) then

  if (-d $ISISROOT/../testData) then

    setenv ISISTESTDATA $ISISROOT/../testData

  else

    setenv ISISTESTDATA /usgs/cpkgs/isis3/isis_testData

  endif

endif

if ( -f $ISISROOT/scripts/tabcomplete.csh ) then

  source $ISISROOT/scripts/tabcomplete.csh;

endif

#!/bin/bash

#

# This file should be executed within your current shell using the "." or "source"

# command.

#

# On the command line type:

# > set ISISROOT=????

# > . isis3Startup.sh

#

# Replace the "????" in the above command line with the path where you installed

# the Isis distribution

#

if [ ! "$ISISROOT" ]; then

  ISISROOT=/usgs/pkgs/isis3/install

  export ISISROOT

fi

if [ ! "$ISISDATA" ]; then

  if [ -d $ISISROOT/../data ]; then

    ISISDATA=$ISISROOT/../isis_data

  else

    ISISDATA=/usgs/cpkgs/isis3/isis_data

  fi

  export ISISDATA

fi

if [ ! "$ISISTESTDATA" ]; then

  if [ -d $ISISROOT/../testData ]; then

    ISISTESTDATA=$ISISROOT/../testData

  else

    ISISTESTDATA=/usgs/cpkgs/isis3/isis_testData

  fi

  export ISISTESTDATA

fi

if [ "$PATH" ]; then

  PATH="${PATH}:${ISISROOT}/bin"

else

  PATH="$ISISROOT/bin"

fi

export PATH