ocide: add command line options and documenting these

[GitMensch]

To work around LADSoft/OrangeC#124 I wanted to start using another cwa - but just starting ocide.exe X:\path\to.cwa did not load the file instead of default.cwa.

I've seen the version switch being implemented but other than that nothing. Command line options for the following parts would be good:

• path to cwa: start with this, instead of default.cwa
• path to file: open this file after loading the cwa
• /? / --help some useful message where to find help - or opening it
• option to start with an empty workspace, maybe --empty-workspace?

Possible command line to process: ocide.exe x:\path\to\some.cwa y:\path\to\file1.c "y:\path to file2.h"

[LADSoft]

:) I will get to this soon but meanwhile if you specify a file (or a list of files) it will open them. There are also two switches, '/p' opens a project and '/w' opens a workspace. Good idea to have a 'create workspace' option and a help option and of course will update the docs...