Prepare for Aperture Neuro submission: switch to MIT license, update lifecycle to stable, add CITATION file

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: bbuchsbaum

DESCRIPTION

@@ -4,7 +4,7 @@ Title: Regression Analysis of Functional Magnetic Resonance Imaging Data
 Version: 0.1.2
 LinkingTo: Rcpp,RcppArmadillo, roptim, RcppParallel
 Authors@R: person("Bradley", "Buchsbaum",, role = c("aut", "cre"), email = "brad.buchsbaum@gmail.com")
-License: GPL (>= 2)
+License: MIT + file LICENSE
 Description: Provides tools for the analysis of functional magnetic resonance
     imaging (fMRI) data. Facilities are included to construct flexible
     hemodynamic response functions, experimental regressors, and conduct

LICENSE

@@ -0,0 +1,2 @@
+YEAR: 2026
+COPYRIGHT HOLDER: Bradley Buchsbaum

README.md

@@ -2,10 +2,13 @@
 
 [![R-CMD-check](https://github.com/bbuchsbaum/fmrireg/actions/workflows/R-CMD-check.yaml/badge.svg)](https://github.com/bbuchsbaum/fmrireg/actions/workflows/R-CMD-check.yaml)
 [![Codecov test coverage](https://codecov.io/gh/bbuchsbaum/fmrireg/branch/main/graph/badge.svg)](https://app.codecov.io/gh/bbuchsbaum/fmrireg?branch=main)
-[![License: GPL v2](https://img.shields.io/badge/License-GPL_v2-blue.svg)](https://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html)
-[![Lifecycle: experimental](https://img.shields.io/badge/lifecycle-experimental-orange.svg)](https://lifecycle.r-lib.org/articles/stages.html#experimental)
+[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
+[![Lifecycle: stable](https://img.shields.io/badge/lifecycle-stable-brightgreen.svg)](https://lifecycle.r-lib.org/articles/stages.html#stable)
 
-# install.packages("remotes")
+## Installation
+
+```r
+install.packages("remotes")
 remotes::install_github("bbuchsbaum/fmrireg")
 ```
 
@@ -95,7 +98,7 @@ https://github.com/bbuchsbaum/fmrireg
 
 ## License
 
-GPL (>= 2)
+MIT
 
 <!-- albersdown:theme-note:start -->
 ## Albers theme

inst/CITATION

@@ -0,0 +1,9 @@
+bibentry(
+  bibtype  = "Manual",
+  title    = "fmrireg: Regression Analysis of Functional Magnetic Resonance Imaging Data",
+  author   = person("Bradley", "Buchsbaum", email = "brad.buchsbaum@gmail.com", role = c("aut", "cre")),
+  year     = "2026",
+  note     = "R package version 0.1.2",
+  url      = "https://bbuchsbaum.github.io/fmrireg/",
+  header   = "To cite fmrireg in publications use:"
+)