NXdiff new command line option "--retype". This replaces #333.

[stuartcampbell]

Original reporter: marieyao

Add a general option for type renaming.

Usage: --retype oldname1=newname1 --retype oldname2=newname2 ...

[stuartcampbell]

Original reporter: marieyao

In [changeset:1858]:

#CommitTicketReference repository="" revision="1858"
Refs #338. Added new command line option --retype.

[stuartcampbell]

Original reporter: marieyao

In [changeset:1859]:

#CommitTicketReference repository="" revision="1859"
Refs #338. Cleaned up.

[stuartcampbell]

Original reporter: marieyao

In [changeset:1862]:

#CommitTicketReference repository="" revision="1862"
Refs #338. Fixed a bug found by Jeeem.

[stuartcampbell]

Original reporter: marieyao

In [changeset:1866]:

#CommitTicketReference repository="" revision="1866"
Refs #338. Make --show-values awared of --retype.