fix indenting in the makefile

Remove the unnecessary spaces.
fix include of header files

The modules were moved to subdirectories.
Therefore the including in the main file have to be fixed.
remove unused line in uart module

Because of the comment style there was a warning.
init msp430 clock

To get a stable msp430 clock for uart initialize the clock.
add delay_ms function

We have a 1 Mhz clock. So we need 1000 cpu cycles for 1 ms.
add helper macro to toggle debug led
measure adc value

For now without interrupt because the interrupt did not work.
add code for dht11 temperature and humidity measuring

Add dht11 code from https://github.com/bafeigum/DHT11-Library-for-MSP430.
Changed the comments from // to /*. Otherwise there are a a lot of gcc warnings with the settings in the makefile.