Add function for checking wether file exists to osinterface, BMP screenshots can now be saved without WIN32 specific methods.

fix syntax

use elif

run it with bash

fix directory incantations

add missing build steps

dont use colors if not terminal

update install.sh

add sanity check

changes

set verbose mode

enable debug output

changes to get it working on mac

Platform specific cmakelists

fix issue with intptr_t not being found/defined

update build scripts

see if it can find the pkg-config

try running it outside of cmake

check whether excho works way we expect

try -e

remove debug info