Supports armv7s arch.
Merge pull request #80 from kkazuo/armv7s

Supports armv7s arch.
Fixed #81: +[NSFNanoObject NSObjectToJSONString:error:] improperly checks error parameter
Minor update to the documentation.
Fix for issue #83. -[NSFNanoBag addObject:error:] uses NSFNanoObjectProtocol method to obtain object dictionary representation.
Merge pull request #84 from billgarrison/master

Fixed #83: Exception thrown when adding objects conforming to NSFNanoObjectProtocol to a bag
Fixed #85: Error in - (NSFNanoDatatype)NSFP_datatypeForTable:(NSString *)table column:(NSString *)column
Fixed #82: Remove all statements testing for YES
Fixed #86: Remove warnings and minor cleanup
Fixed #87: Use __autoreleasing annotation on (NSError **) method params
Fixed #88: Use limit and filterClass in the same NSFNanoSearch does not work
Fixed #89: Is SQLITE_OPEN_AUTOPROXY a required option?
Mods to fix #93. Eliminated -[NSFNanoEngine NSFP_setFullColumnNamesEnabled]. In all invocations of -[NSFNanoResult valuesForColumn:], all references to columns of the form <tableName>.<columnName> are reduced to just <columnName>. All unit tests pass.
Some code cleanup in -[NSFNanoEngine executeSQL:] around obtaining object values from a query.
Merge pull request #94 from billgarrison/issue-93

Fix #94: Mods to fix #93
Fixed #91: -[NSFNanoEngine isTransactionActive] works but misinterprets sqlite3_get_autocommit()
Fixed #92: The table "NSFP_SchemaTable" is never created, but NanoStore attempts to insert stuff into it.
Fixed #96: Argument to 'NSMutableArray' method 'addObject:' cannot be nil
Fixed #97: Replace deprecated 'addTimeInterval' with 'dateByAddingTimeInterval'
Fixed #98: Add test coverage