add tabs for navigation
replace RGraph with hightchart-ng
add trend tab in navCtrl
make TrendCtrl to use new format of mock data
rename exp_expenses_mock.json
rename exp_expenses_mock.json
refactor table css
add sortable-table directive
move TableCtrl to use new directive
refactor controllers name + routing
move 'category-select-table into categories-trend.html
 remove redundant files and controllers
rename controllers