Author's Log Update

A new entry in the Author's Log for January 27, 2014

Also added a copyright notice to the log and updated the .gitignore file
to skip HTML in the doc/ directory.
WIP Refactored Tokens.x

In prepairation for using a state aware lexer Tokens.x has been refactored
to use a monadic lexer which can also return errors.

TODO:
  * Handle errors down stream
  * add state to lexer
Monadic Lexer working

The rewritten lexer now has provides the same level of functionality as
the one it replaced.
String interperitation inital setup

Single and double qouted strings added to lexer.  Double quoted strings
replace escaped characters.

TODO:
  * fill out rest of escape sequences
  * code interplation ( #{...} )
Interpolated Expressions ( #{...} ) Scanned

TODO:
  * handle literal hashes and inline lambda blocks
Extended Strings can be parsed

To accomplish this the Lexer was again extended.  It now has a stack of
states that can be pushed onto and popped from.

A new node in the AST was created for these strings.  The evaluation of
that node is still pending

TODO
  * Parse Extended Strings
Evaluate Extended Strings

Strings with embeded code in them now evaluate correctly.  The String
Concatenation will need to be rewritten once escapes are implimented, but
this is a number of steps down the road.

TODO:
  * Escape Strings
  * String Class methods
  * error functions
  * to_s method for classes and objects