Make it possible to upload screenshots when a custom screenshot command was used.
Warn if no custom command was given and scrot is missing.
Warn if uploading was enabled and curl is missing.

--- a/screenfetch-dev
+++ b/screenfetch-dev
@@ -226,10 +226,10 @@
 	printf "   ${bold}-N${c0}                 Strip all color from output.\n"
 	printf "   ${bold}-t${c0}                 Truncate output based on terminal width (Experimental!).\n"
 	printf "   ${bold}-p${c0}                 Portrait output.\n"
-	printf "   ${bold}-s(u)${c0}              Using this flag tells the script that you want it\n"
+	printf "   ${bold}-s [-u IMGHOST]${c0}    Using this flag tells the script that you want it\n"
 	printf "		      to take a screenshot. Use the -u flag if you would like\n"
 	printf "		      to upload the screenshots to one of the pre-configured\n"
-	printf "		      locations. These include: teknik, pomf, imgur, mediacrush, and hmp.\n"
+	printf "		      locations. These include: teknik, pomf, imgur, mediacrush and hmp.\n"
 	printf "   ${bold}-c string${c0}          You may change the outputted colors with -c. The format is\n"
 	printf "                      as follows: [0-9][0-9],[0-9][0-9]. The first argument controls the\n"
 	printf "                      ASCII logo colors and the label colors. The second argument\n"
@@ -2053,8 +2053,19 @@
 #######################
 
 takeShot () {
+	take_screenshot="yes"
 	if [[ -z $screenCommand ]]; then
+		screenCommand="scrot -cd3"
+		if ! type -p scrot >/dev/null 2>&1; then
+			errorOut "Cannot take screenshot! \`scrot' not in \$PATH"
+			take_screenshot="no"
+		fi
+	fi
+	if [[ "${take_screenshot}" == "yes" ]]; then
 		if [[ "${upload}" == "1" ]]; then
+		  if ! type -p curl >/dev/null 2>&1; then
+			errorOut "Cannot upload screenshot! \`curl' not in \$PATH"
+		  else
 			shotfiles[1]=${shotfile}
 			if [ "$distro" == "Mac OS X" ]; then 
 				displays="$(system_profiler SPDisplaysDataType | grep 'Resolution:' | wc -l | tr -d ' ')"
@@ -2063,7 +2074,7 @@
 					shotfiles[$i]="$(echo ${shotfile} | sed "s/\(.*\)\./\1_${i}./")"
 				done
 				printf "Taking shot in 3.. "; sleep 1; printf "2.. "; sleep 1; printf "1.. "; sleep 1; printf "0.\n"; screencapture -x ${shotfiles[@]} &> /dev/null
-			else scrot -cd3 "${shotfile}"; fi
+			else $screenCommand "${shotfile}"; fi
 			if [ -f "${shotfile}" ]; then
 				verboseOut "Screenshot saved at '${shotfiles[@]}'"
 				printf "${bold}==>${c0}  Uploading your screenshot now..."
@@ -2120,6 +2131,7 @@
 			else
 				errorOut "ERROR: Problem saving screenshot to ${shotfiles[@]}"
 			fi
+		  fi
 		else
 			shotfiles[1]=${shotfile}
 			if [ "$distro" == "Mac OS X" ]; then 
@@ -2129,15 +2141,13 @@
 					shotfiles[$i]="$(echo ${shotfile} | sed "s/\(.*\)\./\1_${i}./")"
 				done
 				printf "Taking shot in 3.. "; sleep 1; printf "2.. "; sleep 1; printf "1.. "; sleep 1; printf "0.\n"; screencapture -x ${shotfiles[@]} &> /dev/null
-			else scrot -cd3 "${shotfile}"; fi
+			else $screenCommand "${shotfile}"; fi
 			if [ -f "${shotfile}" ]; then
 				verboseOut "Screenshot saved at '${shotfiles[@]}'"
 			else
 				errorOut "ERROR: Problem saving screenshot to ${shotfiles[@]}"
 			fi
 		fi
-	else
-		$screenCommand
 	fi
 }