Version 1.3.0 beta 2010-03-11

ovensong -- new acoustic dataset (Dawson & Efford J Appl Ecol; see also 'secr-sound.pdf')
New detector types 'count', 'signal' ('polygon' and 'transect' under development)
New detection functions 'binary signal strength', 'signal strength', 'signal strength spherical'
Finite mixture models for heterogeneity in detection parameters (use 'h2' in model formula) 
Documentation via Sweave vignettes: secr-overview.pdf, secr-sound.pdf, secr-finitemixtures.pdf
secr.fit -- Improved handling of structural relationships scaleg0 and scalesigma
secr.fit 'start' argument may be a previously fitted nested model
secr.fit default initial value algorithm uses 'RPSV' instead of 'dbar'
secr.fit new pre-defined covariate term T for time trend in detection parameter model formula
ellipse.secr -- new function for confidence ellipses of fitted parameters
LLsurface.secr -- new function to plot log-likelihood surface for 2 dimensions at a time
attenuationplot  -- new function for acoustic models
Various other interface bugs fixed

Version 1.2.11 2009-12-22

Bug fix for session names not in alphanumeric sequence

Version 1.2.10 2009-10-21

large models -- more robust memory allocation in external C code (malloc)
new example datasets -- 'possum' and 'ovenbird'
confint.secr -- improved profile likelihood confidence intervals, both beta and real parameters
secr.fit -- detects non-finite values of real parameters during maximization & terminates (cf stepmax in nlm)
sim.capthist -- time-varying detection parameters
sim.resight -- new function
secr.fit -- experimental and undocumented mark-resight

Version 1.2.9 2009-10-05

split.traps -- new method
print.traps -- now displays component name if list
secr.fit -- new argument details$minprob; new default 1e-50 may affect likelihood
print.capthist -- new argument 'condense' for condensed printing of proximity data
verify.mask -- fixed bug with mask lists
verify.capthist -- additional checks for missing or badly coded data

Version 1.2.8 2009-09-30 and later

Further changes to external C code for non-Windows platforms (now expected to work)
Minor editting of documentation files
Improved handling of multi-session capthist objects (2009 10 01)
Restore output of dAICc in AIC.secr (2009 10 02)

Version 1.2.7 2009-09-29

External C code re-written to conform to ISO C99 for use on non-Windows platforms
External C code now relies on R math functions dpois, dbinom
make.capthist -- new argument 'sortrows'
print.secr -- minor changes
secr.fit -- secr version number recorded in secr object
secr.fit -- optional check of input data with 'verify' 
verify (new) -- function to check data in capthist objects
ip.secr (new) -- density estimated by simulation and inverse prediction
collate -- minor bug fixed
plot.secr -- confidence limits of detection function by delta method
vcov.secr -- new option for covariances between real parameters

Version 1.2.6 2009-09-10

Simulation functions (sim.popn, sim.capthist, simulate, sim.secr) use R random number generators and seeds.
New S3 method simulate.secr and function sim.secr for simulating from a fitted secr model
New S3 methods deviance and df.residual
secr.make.newdata is now exported (previously internal)
Additional components in secr object returned by secr.fit: design, D, start
Bugs fixed in secr.make.newdata, secr.fit and make.capthist
