Butt ugly patch for android build

Signed-off-by: Anton Lundin <glance@acc.umu.se>
Added getline for android

getline function is not included in the bionic c libraries of android. Hence, to
compensate, it has been directly taken from http://goo.gl/hm5ldd with a minor
change - inclusion of stdlib

Signed-off-by: Venkatesh Shukla <venkatesh.shukla.eee11@iitbhu.ac.in>
Initial working version help.c

On android, Qt libraries are not to be used. But there are some important
functions implemented in qthelper.cpp which will be needed for subsurface
library on android. Hence, as a replacement, help.c will provide all those
functions. Exif related functions are not implemented yet as it would need cpp.
Instead, I think libexif should be used.

Signed-off-by: Venkatesh Shukla <venkatesh.shukla.eee11@iitbhu.ac.in>