Merge pull request #1 from husa/dev

Dev
templates moved to separate files
Merge branch 'master' of https://github.com/husa/ExpenseManager
added proper categories rendering and generation
updated to contain some basic contribution guide
some small updates
'Add expense ' button to add random expense item
added css tooltips instead of built-in "title"
stupid typo fix
demo page added
live JS Hint linting added
Merge branch 'master' of https://github.com/husa/ExpenseManager
tooltips small fixes