chain_id -> condition and also enhance / document functionality of pairs()
bump version to 2.5
issue #102, change to just warning
make a real example for the new pairs()
include some examples in submodule example-models
update submodules
Merge pull request #108 from stan-dev/enhance_pairs

Enhance pairs
update inst/NEWS
add KernSmooth to package DESCRIPTION
work on issue #110, deal with long stanc error msg
work on issue #111 and #112
Merge branch 'develop' into feature/partial-inits

Conflicts:
	rstan/rstan/R/stanmodel-class.R
	stan