fix spelling, make import to typescript possible

[konsultaner]

I tried to fix #7. It does fix it but has some tslint errors.

If you import with import SecureLS from 'secure-ls'; it autocompletes correct in WebStorm and loads the resources, but shows tslint errors.

I also fixed the spelling of a method and added .idea to .gitignore

All up its a start but not perfect.

[coveralls]

Coverage remained the same at 85.932% when pulling 05a931e on konsultaner:master into 93e1152 on softvar:master.

[softvar]

Nice work @konsultaner 👍
Are there still any linting errors? Or the PR is good to be merged?

[konsultaner]

Are there still any linting errors?

Only in the d.ts file in your project. The importing project has no linting errors if imported like this:

import SecureLS from 'secure-ls'

it is probably optimizable, but mergable im my eyes.

[softvar]

@konsultaner Thanks for the wonderful work