Merge pull request #906 from dorkster/fixes

Display the default game warning on the title screen
Handle absolute paths for BINDIR in CMakeLists.txt

Looks like this was accidently removed when splitting the CMake file
between engine and game data.
Merge pull request #907 from dorkster/cmake

Handle absolute paths for BINDIR in CMakeLists.txt
Load only last hero_options.
Merge pull request #909 from igorko/fixes

Load only last hero_options.
Allow translating default hero names

Also, fix the ability to translate the "Next Level:" string in power
tooltips. po/pot generation was stripping out the leading newline.