Changed mod descriptor file, suppressed warning about mod being made for "older version" of the game

# ACR 1.7 CHANGELOG #
- "Ruthenian principality" government for Ruthenian and Byelorussian countries
- Mechanics for Ruthenian principality
- 3 new unique government reforms for Ruthenian/Byelorussian countries, each deriving it's mechanics from Ruthenian principality and having unique flavor and interactions
- Mission tree for Ruthenia
- "Crisis in the Principality" disaster for Ruthenian principalities
- Small update to Ruthenian minor countries mission tree
- Other insignificant fixes and adjustments

# ACR 1.6.6 CHANGELOG #
- Fixed population census not showing all cultures(or no cultures at all) living in country
- Expanded tariffs and tax regulations in country economy management

Doesn't require campaign restart.

# ACR 1.6.5 CHANGELOG #
- Population census is no longer a major event
- Population census now also shows percentages of each culture's population
- Pop culture names now have their group attached to them, so player won't be confused in situations such as having two different "Scottish" cultures(one being germanic and other celtic) sharing a province
- Pop cultures are now highlighted with green, if they're accepted by country and red if not, making culture view easier to understand and reason about
- Province border improvements in France, Italy, Germany, Pruthenia, Poland and Ruthenia regions

Doesn't require campaign restart.

# ACR 1.6.4 CHANGELOG #
- Tribes and natives with migration ability now migrate population from old province to new one, instead of resetting it to 1000 pops
- Migrating tribe/native nation which has 0 population can no longer migrate to new province, they need at least 1 pop to migrate
- Pomeranian nations can't reform into Prussia

Doesn't require campaign restart.

# ACR 1.6.3 CHANGELOG #
- Code refactoring for population system
- Adjusted province modifiers from population
- Population can now change from wider variety of factors, such as religious violence, natural disasters and etc.
- Adjusted population decrease rates from diseases
- Released Sharjah on the start date

Doesn't require campaign restart.

# ACR 1.6.2 CHANGELOG #
- Redesign of flags for Celtic Union and Bryttania
- Small rebalancing of ideas for Celtic Union and White Ruthenia
- 'Pruthenian monarchy' reform now also has -50 max absolutism

Doesn't require campaign restart.

# ACR 1.6.1 CHANGELOG #
- Minor rebalance of Bryttanian ideas and traditions
- 'United Heptarchy' reform now has -50 max absolutism, emphasizing lower monarch power in relation to the Great Council
- AI can now force it's culture on it's colonies in certain circumstances
- Revolutions of 1830-1840s and 1848-1849 bring harsher effects, so both AI and players would have harder time handling them
- Further balancing of Portugal and Castile, they no longer own provinces in Macaronesia area
- Other minor changes

Should not break saves, thus not requiring campaign restart.