First version of ched command in C (stub).
Fow now, ched just runs the command.
Calculating md5 name of cache file.
Now with a usable filename.
Poor-man ched: keep cache forever, output nothing.
cat-ting cache to output.
Separated "age" functions on "muni" lib.
Now checking if age of cache is < timeout.
Function to create cache path.
Now working with the correct cachefiles.
Able to execute shell commands as well.
Revert "Able to execute shell commands as well."

This reverts commit d76439c840f2aa1c578f4498d033c5314f517113.

Just use ched -yourpars sh -c "yourcommands"
Removed debug print.
Better manpage.
Ability to specify custom cache dir.
Taking working dir into account on caching.

Also added option to ignore that.
Added TODO in makefile.
Removed complicated feature (--cache-dir).
core review -- added some error handling.
Better error handling.