2.0 final released

Finally I just released CRONw 2.0. Basically it's just a rename of RC1 so no need to upgrade if you are using RC1 already.

new features of CRONw 2.0
* complete rewrite of cronw which includes better source file naming and provides a solid basis for future extensions
* greatly improved logging - increase logging output without the need to restart the service
* use mnemonics inside crontab.txt (e.g. say "Mon-Fri" instead of "0-5")
* cron dir support: If you want to execute a job one time a day just put it into the dir cron.daily (same goes for cron.weekly and cron.monthly)
* syntax checking for crontab.txt
* lower system payload - crontab is only parsed if it has changed
* scripting features supported by CMD.exe - write
"echo "Hello World" > C:\testfile.log" in the crontab

Hopefully no old features got lost such as:
* 1,15 in the day field means execution on the 1st and 15th of every month
* 1-10 is equivalent to 1,2,3,...,10
* */5 in the minutes fields means that the command should be executed every five minutes.
* the ability to combine all the above features.

Please note that version 2.0 is to be taken as incompatible with an existing installation of CRONw 1.x (allthough the crontab format hasn't changed). Please read the INSTALL.txt file _before_ installing.

Unfortunately the graphical installer for CRONw (NSIS based) doesn't made it for this release, maybe we can get it ready for 2.1. Help wanted!