a little more flexibility regarding e.g. indentations

[stevethehu]

Is your feature request related to a problem? Please describe.
I want to be able to use 2-space indentations for nesting. The plugin seems to force 4. If I try to delete the extra 2 after creating a new line, it deletes the entire line.

Describe the solution you'd like
I'd like this to either be configurable, or for the plugin to be less pushy about trying to force 4 space indents. As it is now, I need to work around it by e.g. selecting 2 spaces I want to delete and then hitting delete.

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Add any other context or screenshots about the feature request here.

[dalgarins]

Issue cloned to https://github.com/anboralabs/intellij-firebase/issues/41