paper release

clustra v0.2.0-CRAN

• Added a 10,000 id data set bp10k
• Added a second vignette to reproduce associated paper graphics and more
• Reduced vignette dependence to only base graphics
• New function plot_sample built on base graphics
• New function plot_smooths built on base graphics
• New function plot_silhouette built on base graphics
• Expanded capability of gen_traj_data beyond 3 clusters with type and intercept parameters
• Modified parameters in clustra
• Added starts = "distant" option in function start_groups
• Added parameter starts in clustra_sil and clustra_rand
• New internal functions kchoose and ic_fun (not exported)