Even better zone shapes.
gcc update:
- removed support for 4.6
- compilation fixes for 4.7
- copy of campaign heroes can be done later (at the point where it's clear if they will be replaced)
- fixed bug when generating random map and adding player info data
Merge branch 'develop' of https://github.com/vcmi/vcmi into RMG
Introduced 3-value logic for free, blocked and possibly occupied tiles. Refactoring.
Zone borders.