Converting Access & Auth to namespace

Notice that auto refactoring has created a nested namespace. Not sure this is what we want - so we might have to edit those nested namespaces afterwards (I think they don't look so good)

Notice that auto refactoring has created a nested namespace. Not sure this is what we want - so we might have to edit those nested namespaces afterwards (I think they don't look so good)

2 steps required:

1. Refactor > Move > \Piwik\Core\Config (uncheck "Create new File")
2. Refactor > Rename > Piwik_Config to Config

Notes:
  - Modified ManySitesImportedLogs fixture to add segments if desired.
  - Switch to synchronous execution of curl requests until deadlocking issue in archive processing is dealt with.
  - Fixed bug in LogAggregator where if a segment required a subquery, archiving would failed.

Fixing regressions in recent refactorings, fixing regression in Archive.php refactoring and fixing bug in integration testing code which sets 'date' query param.

Refactored archive data querying code. Removed tree-like data structure from Piwik_Archive, added memory optimizations for archiving (not storing archive processing instances), added optimization for querying data indexed by site + date, added ability to select multiple blobs/metrics at once (from different plugins), added optimization to Piwik_ArchiveProcessing_Period where numerics/records are selected all at once instead of one at a time.

Also added data access layer object for archive querying code, allowed anonymous function objects to be used as DataTable filters, and removed 'timestamp' DataTable metadata.

Proper fix for this problem, adding static array of "Row evolution not supported"

Also I decided to enable tests so they all run on my box /standard ubuntu, rather than travis CI.
Fixed a bug in tests that plugins language files were not loaded early enough.

Enabling PDF tests on php 5.4 only, rather than 5.3, so I can create the test files on my computer and have green travis - hopefully that works!

 * making tests pass!
 * enabling DevicesDetection tests, even though DevicesDetection plugin is disabled by default.

Get benchmarking system to work with new test structure and make it easier to run benchmarks through VisualPHPUnit.

refs #3913 Fixes API for dashboards + disabling Dashboard API tests for now

Adding future look ahead window to the SQL trying to detect the current visitor
+ fixing small bug discovered (in the tests) as a result of this fix

 * new segment 'siteSearchKeyword'
Fixes #3903, #3905:
 * adding few fields in the Live API output to accomodate getSuggestedValuesForSegment
 * renamed other fields for consistency with segment names
Fixes #3906:
 * new API: getSuggestedValuesForSegment which returns top suggested values for a particular segment. It uses the Live.getLastVisitsDetails API to fetch the most recently used values, and will show the most used values first

 * Adding tests for everything. The test case actually generates data for all segments so that VisitsSummary.get returns some data for each of the 47 segments being tested returns some data.
  How it works:
  * generate extended data in fixture
  * Tests (1) call getSuggestedValuesForSegment for each segment, check there is some data returned for each segment
  * get the first suggested value from the list,
  * Tests (2) call VisitsSummary.get with this segment value, eg. countryCode==ru.
    * I worked this way for all 47 segments until all tests had some data ==> now we know that all segments have been tested and that the auto suggest works for all segments. TDD FTW!

Refs #3781, fixing build, revert last change and add getSuperUserLogin to Piwik_Access (so FakeAccess can mock it). Modified PDFReports to use Piwik::getSuperUserLogin instead of accessing config directly.