Version 2.6.2 release

Fixed wrong ephemeris selection bug

Version 2.6.1 release

Fixed declination bug.
Fixed external libraries bug.

Version 2.6.0 release

Whats new in 2.6.0

• Added a zlib license
• improved arguments and argument parsing
  • added [-x|--exit] argument which is true if you want to exit the program
    after use
  • using external args library to parse args (https://github.com/Taywee/args)
  • args don't need to be ordered now, and you can pass any that you like
• Replaced the data/variables.txt with a MPCS.ini file
  • added external library for using .ini (https://github.com/mcmtroffaes/inipp)
  • put inside resources
• Improved the codebase to be leaner and better documented
• Error handling improved
• Added cmake paramters that allow to install a program and distribute it (hence this release)

Some important notes:

• version 2.6 is intended to be the last version of MPCS 2, however, it will still
  get patch level updates
• this version will separate into its own branch (2.6.x)
• all further development will be directed towards MPCS 3 (new main branch)