Add dummy intro cutscene to squash error message

Closes #1010
Merge pull request #1014 from dorkster/default_mod

Add dummy intro cutscene to squash error message
Use full path for portraits
Fix crash in RenderDevice cache lookup
Merge pull request #1015 from dorkster/fixes

Fix crash in RenderDevice cache lookup
Do NULL-check on Image pointer when caching
Merge pull request #1017 from dorkster/fixes

Do NULL-check on Image pointer when caching
Don't use "male01" as default portrait name

Fixes #1018
Remove hard-coded paths for MenuStatBar graphics
Merge pull request #1019 from dorkster/fixes

Don't use "male01" as default portrait name
Merge pull request #1020 from dorkster/statbar

Remove hard-coded paths for MenuStatBar graphics
Fix getting the next level of an upgradable power

Fixes #1021
Include upgradable powers in calculation of available power points
Count requires_point for base level of upgradable powers
Merge pull request #1022 from dorkster/menupowers

Fixes for upgradable powers
Attempt to fix crash in WidgetTooltip::render()
Allow using mouse wheel binds outside of list/scroll boxes
Merge pull request #1025 from dorkster/fixes

Attempt to fix crash in WidgetTooltip::render()
Fix heap corruption
Merge pull request #1027 from igorko/master

Fix heap corruption