JS and HTML Validation added

+ jshint
+ htmlhint
+ jscs
+ dist added to gitignore
Merge pull request #10 from kashyap02004/master

JS and HTML Validation added
Validation errors fixed

+ jshint errors fixed
+ jscs styleguide errors fixed
+ docs added to gulp validation paths
Validation errors fixed

+ jshint errors fixed
+ jscs styleguide errors fixed
+ docs added to gulp validation paths
Merge pull request #11 from kashyap02004/master

Validation errors fixe
app.js jscs error fixed
Merge pull request #12 from kashyap02004/master

app.js jscs error fixed
tree-browser documentation improved
re-built with latest validations
Merge remote-tracking branch 'upstream/master'
Merge pull request #13 from kashyap02004/master

Tree-Browser documentation improved