fix name of README file
Merge pull request #2 from selik/master

Trivial fix for name of README file in setup.py
Implemented separate backend structrure, moved all yajl code into ijson/backends/yajl.py
Pure python backend
.gitignore *.pyc
Consolidate lexing in nextsymbol()
Moving call to string lexing into nextsymbol
Turn Reader into an iterator
Return terminating quote with strings
Split readuntil into two lexing functions for strings and for everything else
Ensure completeness of \-escapes with a regexp
Restored accidentally broken default engine
Use built-in substring search instead of regexps. More efficient for strings with lots of \-escaped characters.
More tests for strings
Use [-1:1] instead of strip('"'). The latter removes *all* quotes from both ends.
Don't use invalid string for the incompleteness test
lexem() now builds up self.buffer indefinitely and cleans it up only if
self.pos > BUFSIZE instead of on every lexem. Another speedup!
Use 16K buffer
Merge lexing of chars and numbers.
Return opening quote from stringlexem(), simplify calling from next()