Disable colored grep to fix substring operations

I have grep alias with --color=auto in .bashc by default in my Ubuntu installation.

It looks like linuxdeploy.sh fails to work with colored grep, particularly bash substring {::} is  working incorrectly.

To fix this I've added this code in the beginning of linuxdeploy.sh:

```bash
alias grep="grep --color=never"
shopt -s expand_aliases
```

Can this be added to linuxdeploy.sh? Or it is not pgmodeler-related issue and I need to set up my env/aliases by myself.

Thanks.