[Request Feature] Separate features into modules.

[dphans]

Kotlin extensions is huge, I think author should separate extensions by modules.

For examples:

• core module, include generic class type helpers: 'com.github.matteocrippa:karamba-core:1.2.0'
• image module, include bitmap, drawable, images helpers: 'com.github.matteocrippa:karamba-image:1.2.0'
• localization module, include currency, locale, country,... helpers: 'com.github.matteocrippa:karamba-localization:1.2.0'
• dialogs module, include alert, toast, bottomsheet helpers: 'com.github.matteocrippa:karamba-dialogs:1.2.0'

... Core android (ktx) already do that, reference modules of material-dialogs: https://github.com/afollestad/material-dialogs