Fix isWeaklyIsolated for interfaces

Interfaces are aggregate types, but their FieldTypeTuple is a tuple containing
exactly themselves. This causes an infinite recursion in isWeaklyIsolated.
Since the implementation of an interface is not known at compile time,
isWeaklyIsoleted must be false for interfaces.

Signed-off-by: Luca Niccoli <lultimouomo@gmail.com>
Ignore apt-get errors.
Fix compilation of the libev driver.

The timer functionality has been commented out for now.
Merge pull request #602 from lultimouomo/fixIsWeaklyIsolated

Fix isWeaklyIsolated for interfaces
Make task events consistent when starting new tasks is involved.

Nested task starts caused inconsistent task event orders (startA->startB->endB->endA instead of startA->yieldA->startB->endB->resumeA->endA).
Add first implementation of an optimized URLRouter.

The new routing algorithm is disabled by default, use VibeRouterTreeMatch to enable.
All routes are combined into a single DFA, enabling O(n) matching vs. O(n*m), as in the previous algorithm (n=length of URL, m=number of routes). The assembly of the DFA graph is still too slow, though.
Fix 64-bit compile errors.
More 64-bit compile fixes.
Make generating stack traces (Exception.toString()) in the HTTP server optional.

The new HTTPServerOption.errorStackTraces option is used to control this behavior. Stack traces are enabled by default for backwards compatibility reasons.
Make logging arguments lazy to avoid evaluating costly log message arguments when not necessary.

In particular, calling the costly Exception.toString() method, which is often used in debug messages to provide extended exception information, is to be avoided when the minimum log level doesn't include debug messages.
Use a DictionaryList for HTTPServerRequest.files to enable multi-file uploads.
Get BSON serialization to work during CTFE half way.

LittleEndianToNative doesn't work for CTFE, so it doesn't work, yet.
Refactor, fix @byName for arrays/AAs and add @asArray for the serialization code.

- Using a new SerializableFields template to simplify iteration over composites
- Added @asArray to force serialization of a composite as a flat array instead of an AA
- @byName now also works for enum array/AAs in addition to enum fields
Add a first version of an ORM with a MongoDB driver for the start.

The current proof-of-concept functionality is limited to insertion and simple queries.

The main goals, which are not achieved by the existing solutions for D, are the avoidance of memory allocations for optimum performance and the use of statically checked query expressions, at least for the most common queries. Avoiding memory allocations is achieved by making use of templates and related meta programming tools and by using direct serialization of D types instead of storing a database specific data format in memory. Note, however, that this is still dependent on the database driver and the current MongoDB driver does perform some allocations.
Implement ORM.update() for simple field set updates.
Change query and update expressions to be passed as values instead of alias arguments.
Add Path.toHash for DUB compatibility.