updated changelog for 0.2.3
updated changelog for 0.2.3

markschmidt/typhoeus,bitherder/typhoeus,t3hpr1m3/typhoeus,telekomatrix/typhoeus,chazsconi/typhoeus,bitherder/typhoeus,PericlesTheo/typhoeus,typhoeus/typhoeus,pravi/typhoeus,chazsconi/typhoeus,AvnerCohen/typhoeus,tompscanlan/typhoeus,sportngin/typhoeus,EddyLuten/typhoeus,wcmonty/typhoeus,nju520/typhoeus,markschmidt/typhoeus,bitgal/typhoeus,tinfoil/typhoeus,xing/typhoeus,kkirsche/typhoeus,xing/typhoeus,nevans/typhoeus