pascal p5c Code

clib changes;
- remove random library function
it's not guaranteed to be present in all standard c libraries, likely similar to rand() where it exists
in clib it returns a real value between 0 & 1
- new tests in tclib.pas

in build scripts use older syntax for mktemp()
- new syntax maight not be present on some systems

minor mods to test files so compares work on different systems

string.inc.pas:
- strCompare now implemented in pascal
- the c code didn't compile on mingw

add missing file frm previous commit

clib.inc.pas:
- moved c string functins to their own lib file, cstr.inc.pas
- add exit() and system() functions

add plot.pas example program

add assert.inc.pas
- similar to c language assert

intermediate build files now in /tmp

oops!
in build scripts, environment variable needs to be tested before use

rej-tests/test.sh:
- some test files were missed

examples/rtest:
- add message to wait for /dev/random to generate random numbers

minor build script & documentation upgrades

gen:
- add --mintest option to skip long running tests (the ones in *-test directories)
- add test for build scripts compile only when necessary

guide.txt:
- add another tutorial in the references section
- fix typos
- for p5x, describe double quotes extension

tp5x.pas
- minor test improvements

include files now guard against inclusion more than once
- the various test programs now check this

- minor compiler & test improvements
- minor refactoring of conformance tests
- improvements to readkey() & console.inc.pas
- compile scripts use temp file in tmp dir instead of xxx.1.pas

cdefs.inc.pas renamed sys.inc.pas

console.inc.pas:
----------------
use read() not getchar() for keypressed(),
- this allows detection of escape key vs escape sequence (eg arrow keys)
add cursur move functions

add examples/rtest.pas - test random numbers

pcom.pas
--------
optimise out constant lhs of boolean expressions

string.inc.pas
--------------
some functions that examine only their arguments are given the const attribute
- this should allow gcc to optimise code a little

add more tests

small changes to error handling,
- better recovery
- fewer spurious follow on errors

added toupper() & tolower string functions

more tests

pcom.pas
- bugfix for illegal tag field

additional p5x changes:
- program parameters now padded with null characters instead of spaces
this should make string processing easier
- "double quoted" strings allowed.
can now use __FILE__ preprocessor macro in code
- bugfix for illegal tag field

add strval() & strCompare() to string.inc.pas

add random function in clib.inc.pas

new tests added

other minor mods

more statement semicolon tests
add test title to xterm window
cnm test scropt updated to output new line after key pressed, not before
update test output files