+filters, +file I/O, +abbreviations, expanded diff, cleanup

[exif]

Extra work for no raisin:

Filtering

• Added ability to filter templates and packages by keywords contained in metadata
  • Templates can be filtered by name, description as well as user
  • Packages can be filtered by name, summary, description, arch, and repository

    File I/O

• Added ability to output listed packages to file
• Added ability to output diffs to file
• Added ability to read from file when running a diff
• Added ability to read repo from file

  Diff additions

• Added ability to compare the machine config to a package list in a file or to the currently installed packages on the system
  • Can also compare two files (this is not really necessary but I thought maybe the functionality would already be there if the other stuff is implemented)
  • My thinking was that this could simplify managing packages a little for the user as well as make it easier to keep track of changes if you don't have time to do everything in one go.
  • Eg. instead of merging system and remote template and then having to worry about dependencies you need being removed if you don't want a certain package in the template, or diffing system and remote template and then adding packages one at a time, you could diff system and remote template, output to file, create new template from edited diff (and deps will then be pulled in if missing), merge with system then save
  • If you need to take a break or if something goes wrong, you can save changes to file and resume later

    Syntax edits

• Added abbreviated versions of most options
• Fixed a couple of inconsistencies in existing syntax definitions

  Instruction edits

• Added instructions for all new features (I think?)
• Expanded/clarified a couple existing sections

  Misc

• Made a couple cosmetic edits like making a header match the rest and reorganizing a couple sections
• Might have forgotten some things, needs proofreading

[firnsy]

Merged with additional edits. Thanks for the awesome suggestions.