fixed broken links in storybook js for three files

[M-ZubairAhmed]

Issue

• The storybook was not compiling as import reference stories/index.js for Input,TruncatedTextBox,Grid was incorrect.
  

Solution

• Fixed realtive path to imports
• Built the storybook

[M-ZubairAhmed]

Is it ok if we add storybook-static to .gitignore?

[coveralls]

Coverage increased (+0.0002%) to 0.313% when pulling fba53ae on M-ZubairAhmed:fix-brokenlink-story into ebce583 on kleros:develop.

[n1c01a5]

@M-ZubairAhmed yes if it's a good idea to add this folder in the .gitignore

[M-ZubairAhmed]

@n1c01a5 there seems to be something wrong with travis