Trap incorrect inputs

[petermr]

Users will mistype data such as projectnames and dictionaries.
Trap this prettily and give simple error messages.

Action: after tomorrow create incorrect inputs for

ami-search-new -p myproject --dictionary country /some/where/dict

Typical errors:

• ami-serach-new (misspelt)
• omit -p
• myproject does not exist
• omit --dictionary
• -dictionary (only one -)
• --diktionary (misspelt)
• --dictionary contry (non-existent)

NOTE: ami-search-cooccur is being replaced by ami-search-new

[petermr]

Trapped missing project and non-exists project files.