GitLab

- use enhanced Switch constructor and the new valid() method to
  avoid potential pitfalls of using Switch::switchType directly.

allow switch/bool values for writeCompression in system/controlDict

- eg,
    writeCompression false; or writeCompression uncompressed;
    writeCompression true;  or writeCompression compressed;

improves consistency with other controlDict parameters

- Hash returns unsigned
- FixedList templated on unsigned int
- include uLabel.H in UList, HashTable etc. so the output function is know
  throughout

- token class handles both single and double quoted strings. Single quoted
  strings are used to tag regular expressions. At the moment this is just
  syntactical sugar and isn't (yet) treated differently than double-quoted
  strings.

- write output for std:string, with/without single quotes with the method
  writeQuoted(). Use distinct method name to avoid inadvertent compiler
  conversions.

- write wordRe and keyType using writeQuoted()

- Istream and Ostream now retain backslashes when reading/writing strings.
  The previous implementation simply discarded them, except when used to
  escape a double-quote or a newline. It is now vitally important to retain
  them, eg for quoting regular expression meta-characters.

  The backslash continues to be used as an escape character for double-quote
  and newline, but otherwise get passed through "as-is" without any other
  special meaning (ie, they are *NOT* C-style strings). This helps avoid
  'backslash hell'!
  For example,
     string:   "match real dots \.+, question mark \? or any char .*"
     C-style:  "match real dots \\.+, question mark \\? or any char .*"

- combined subfiles in db/IOstreams, some had more copyright info than code
- OPstreamI.H contained only private methods, moved into OPstream.C

Are these really correct?
   IOstreams/Istream.H:#   include "HashTable.C"
   token/token.H:#define NoHashTableC

  * output full file path
  * some preliminary file edits to restore 80-col max.

  * output full file path
  * some preliminary file edits to restore 80-col max.

  * skip doxygen docs for local variables (treeBoundBox)
  * filter transforms 'Typedef' -> @typedef
  * added tools/find-retagged
  * manually changed some InClass tags to Typedef - still needs more attention