hash map fix.
x64 fixes
Merge remote-tracking branch 'remotes/origin/master' into fixes
fixed hashMap clear -> added rehash (fixes #344)
UT fixes
engine mindmap
Update README.md

Added link to the mindmap
Delete LuxEngine.sln

removed unnecessary file.
Merge pull request #352 from nem0/fixes

Fixes
Merge pull request #358 from nem0/advance_animation

Advance animation
Merge pull request #380 from nem0/advance_animation

studio project using qt addin
Merge branch 'master' of github.com:nem0/LumixEngine into advance_animation