OpenFst - Release 1.2

   * Added lookahead matching and filtering for faster composition
   * Added EditFst for mutation of o.w. immutable FSTs
   * Added script sub-namespace defining type FstClass - a non-templated Fst<Arc> 
     to hold the arc template type internally. This and FST operations on
     it allow easier I/O and scripting at the cost of some runtime
     dispatching.
   * Added per-arc-iterator control of Fst caching.
   * Added PowerWeight and Power Arc.
   * Added fstsymbols shell-level command
   * Added total weight removal option to pushing
   * Changed methods for symbol table mutation
   * Numerous efficiency improvements esp in composition, replace, and caching
   * Fixed numerous bugs including:
     - improper types of some approximation deltas
     - sub-optimal hashing functions
     - issues in internal reuse of shortest distance
     - hashing bug in FloatWeight       
     - bug in shortest path queue 
     - symbol table checksumming issues
     - various C++ standards issues
     - Visit() behavior when visitation aborted
   * Added extensions directories including:
     - finite-state archive (FAR) utilities
     - compact fsts
     - lookahead fsts
     - pushdown transducers

OpenFst - Release 1.1

   * Added compat.h to src/include/fst to fix missing defines
   * Fixed bug in acyclic minimization that led to non-minimal 
     (but equiv) results
   * Fixed missing FST typedef in various matchers in matcher.h
     so that they can be cascaded
   * Opened file streams binary where appropriate

OpenFst - Release 1.0

   Additions to beta version:

   * Matcher class added for matching labels at FST states. Includes
     special matchers for sigma (any), rho ('rest'), and phi ('fail')
     labels. (see matcher.h)
   * Composition generalized with arbitrary filters, matchers, and state tables.
     Sequence and matching composition filters provided. (see compose.h, 
     compose-filter.h, matcher.h, state-table.h)
   * Unique n-best (see shortest-path.h)
   * Pruning in determinization and epsilon removal (see determinize.h, 
     rmepsilon.h)
   * New Fst classes: 
      * Compact Fsts for space-efficient representation (see compact-fst.h)
   * New Weight classes: 
      * MinMax
      * Lexicographic
   * Miscellaneous bug fixes
