Add .idea to gitignore

[ronnieotieno]

.idea makes the project settings override local settings

To build the project after merge you will need to set the JDK location, this will be prompted on the console after failed build, click to set.

Idea is that we need to have individual idea settings and not override each other's settings.

Signed-off-by: Ronnie Otieno ronnieotieno2@gmail.com

[kibettheophilus]

Thanks for adding this.