- PtrDictionary and remove(const word&) does not seem to work

- can return NULL pointer instead of FatalError for non-existent entries

- The new cmake seems to be even smarter. If we try to use env variables in
  the .cmake files (eg, with And's sed fixup), they are rewritten in a
  subsequent re-make and take much longer).  Adjusting the compiler values
  themselves causes a full remake. On the positive side, disabling the rpath
  seems to mean we may not need any of this.

  In summary - yuck!

- set CMAKE_INSTALL_PREFIX:PATH now
- allow separation between -config/-make/-install stages
- update for cmake 2.6

- catch missing "controlDict" file immediately via findEtcFile() instead of
  checking IFstream::good(). This avoids segfaulting, since the error
  handling in IFstream uses classes that are not yet initialized.
- use new dictionary features (eg, lookupOrAddDefault) to reduce code
- fixed debug::switchSet to use ref-to-pointer so pointer actually gets set!

- if mandatory is true, findEtcFile() will abort with a message (via cerr).
  This allows a non-existent file to be caught at the lowest level and avoid
  error handling in IFstream, which might not be initialized at that stage.

Conflicts:

	src/Pstream/Allwmake