add erfilter class code from opencv 3.0 dev
add headers
legacy fix: makePtr (some of them)
remove CV_EXPORTS from class definition (it is needed for Windows dll support, not by us)
fix remaining makePtr calls
fix floodFill errors
qualify abs function to use cmath abs() not opencv abs()
remove inheritance of ERFilter from Algorithm

opencv 2.3.1 does not include the Algorithm class yet. ERFilter does
not seem to use any members of Algorithm, it is just good practice
in the newer opencv code to inherit from Algorithm.
add opencv_ml lib to makefile
change cv macro to legacy macro
add opencv textdetection example code to main
add models for character classifier and grouping classifier
update model paths
fix seq fault cause by smart pointer constructor
modulate recognition code into recognize_text
refactor to simplify recognition call (single line)
use 'r' key to call recognition module
Merge branch 'er_detection'