to make installation and uninstallation easier

- Supports MacOS  
- Supports filenames with spaces  
- Has parameters and options now  
- Can define optional output file  
- Help Info with parameter (-h)
- Define scale factor with parameter (-s factor)
- Print version with parameter -V
- Verbose output with parameter -v
- Don't use sed anymore (uses pure bash for what sed was used, or tr)
- New messages if failed dependencies
- Changed how page dimensions are obtained (still needs imagemagick)