Further enhance the check for needed tools:

- update the tool_pattern to use ' || ' as a pattern separator
- which allows using | in regexp
- add checks for cut and xargs
- manually check for grep and sed because they are needed when checking for tools
- print why a test failed, with each tested tool and regexp
- move tools checks before options parsing
- apply conttibutions before computing the version string
- inform user to run make && make install

 /trunk/configure |  173   111    62     0 ++++++++++++++++++++++++++++++++++++++++----------------------
 1 file changed, 111 insertions(+), 62 deletions(-)

0 files changed, 0 insertions, 0 deletions