Add '-grepable' option to make output easier to grep

[jtesta]

The default format isn't easy to grep through. Functions are split up on multiple lines like this:

~~3636~~ KERNELBASE.dll!CreateFileW
    arg 0: C:\Windows\Fonts\staticcache.dat (type=wchar_t*, size=0x0)
    arg 1: 0x80000000 (type=DWORD, size=0x4)
    arg 2: 0x5 (type=DWORD, size=0x4)
    arg 3: <null> (type=<unknown>*, size=0x0)
    arg 4: 0x3 (type=DWORD, size=0x4)
    arg 5: 0x0 (type=DWORD, size=0x4)

Notice that if the user wants to find all calls to CreateFileW with C:\Windows\ included, grep simply won't work. With this new -grepable option, however, the function and arguments are outputted on the same line like this:

~~4824~~ KERNELBASE.dll!CreateFileW {0: C:\Windows\Fonts\staticcache.dat (type=wchar_t*, size=0x0)} {1: 0x80000000 (type=DWORD, size=0x4)} {2: 0x3 (type=DWORD, size=0x4)} {3: 0x005cde8c (type=<unknown>*, size=0x0)} {4: 0x3 (type=DWORD, size=0x4)} {5: 0x80 (type=DWORD, size=0x4)}

Now the user can do grep CreateFileW logfile.log | grep C:\\Windows

[mxmssh]

Very usefull feature! Thanks for adding that. Everything looks good. Could you also please add grepable parameter description in README.md, so everyone can see on github that this functionality is now offered by drltrace.

[jtesta]

Done!