added .idea to ignore
fixed dependencies and added images task
history navigation & menu support added
added function bind polyfill
added custom js concat; splitted main.js
fixed production uglify task
Merge branch 'feature/multiple-js' into development

* feature/multiple-js:
  fixed production uglify task
  added custom js concat; splitted main.js
added about page
Merge branch 'feature/page-about' into development

* feature/page-about:
  added about page
localized menu
reorder menu items behaviour like their places in html
prevent default actions on menu item click
fixed json file name
added lectures page
fixed about page paddings
lecture page prototype added
updated lectures list for a proper browser support
updated lecture page
Merge branch 'feature/page-lectures' into development