I just installed the two libraries on my machine and noticed, a couple of issues that will cause you problems.
First, the DallasTemperature library is a beta, which means that it may (probably will) contain bugs that prevent it from working as describe in some cases. Further, the zip file I obtained does not correctly name the subdirectory for the files. It created a directory called dallas-temperature-control. That directory will need to be renamed to DallasTemperature
After properly installing your sketchbook structure should have the following
.:
Alarm
libraries
./Alarm:
Alarm.ino
./libraries:
DallasTemperature
OneWire
./libraries/DallasTemperature:
change.txt
DallasTemperature.cpp
DallasTemperature.h
examples
keywords.txt
README.TXT
./libraries/DallasTemperature/examples:
Alarm
AlarmHandler
Multiple
Simple
Single
Tester
WaitForConversion
WaitForConversion2
./libraries/DallasTemperature/examples/Alarm:
Alarm.pde
./libraries/DallasTemperature/examples/AlarmHandler:
AlarmHandler.pde
./libraries/DallasTemperature/examples/Multiple:
Multiple.pde
./libraries/DallasTemperature/examples/Simple:
Simple.pde
./libraries/DallasTemperature/examples/Single:
Single.pde
./libraries/DallasTemperature/examples/Tester:
Tester.pde
./libraries/DallasTemperature/examples/WaitForConversion:
WaitForConversion.pde
./libraries/DallasTemperature/examples/WaitForConversion2:
WaitForConversion2.pde
./libraries/OneWire:
examples
keywords.txt
OneWire.cpp
OneWire.h
./libraries/OneWire/examples:
DS18x20_Temperature
DS2408_Switch
DS250x_PROM
./libraries/OneWire/examples/DS18x20_Temperature:
DS18x20_Temperature.pde
./libraries/OneWire/examples/DS2408_Switch:
DS2408_Switch.pde
./libraries/OneWire/examples/DS250x_PROM:
DS250x_PROM.pde