Updated regex to manage white space in titles

Addition of `\s*` in some regex in order to have the same behavior as in markmin2html. That is:
    
    # Title
and
    #Title

or:

    ## Title
and
    ##Title
Typo

Fixed subtle typo
Merge pull request #424 from omartrinidad/master

Updated regex to manage white space in titles
time_expire=0 should clear memcache entry

If time_expire=0, then the cache should be cleared and reset with the
latest value to stay compatible with documented web2py functionality of
how caching works. Previous change broke this compatibility while adding
efficiency in other cases.
Check whether record is None before trying to read its keys otherwise app crashes on GAE (and other memdb's)
Merge pull request #425 from ortgit/issue/1920

time_expire=0 should clear memcache entry
Merge pull request #426 from ortgit/issue/1919

Check whether memdb record is None before trying to read its keys
reverted rpx_account for backward compatibility and added janrain_account for the new engage.js api
added missing files
added private folder back to design page, thanks szunny
apply same rules as DAL's to find tables and fields in column names
Switch for .grid() advanced_search widget

Virtual basic search widget only by removing the _onfocus trigger even that prevent the advanced search to unfold. advanced_search is True by default for backward compatibility...
fix headers in SQLTABLE to handle quoted entities
Merge pull request #427 from michele-comitini/sqltable_quoted_names_support

apply same rules as DAL's to find tables and fields in column names
Merge pull request #428 from BuhtigithuB/patch-1

Switch for .grid() advanced_search widget