Renamed TXT to MD (for better formatting support)
Formatting text and layout of readme

Markdown formatting, Sentence formation improvements, fixed headers and sections and added link to NuGet package gallery for ngpsql
Issue #193, 'Less Than' prepare failing

Add test provided in issue #193, simplified, unprepared and prepared, plus > and <>.
Fix issue, 'Less Than' prepare failing

Do the right thing when getting out of a possible full text match token.
Remove redundant test.
Query Rewriter Tests

Add test from issue #190, plus a couple more, to demonstrate rewriter broken by certain comments.
Query Rewriter

Properly handle comments in queries.
Pool: Guard Timer access inside locker lock

Instead of creating and destroying the timer every time, we just create one
and start and stop it. Starts and stops are guarded against concurrent
timer handlers by taking the global locker lock.
Pool: Lock queues when clearing them

We lock queues in all other circumstances, so we need to be consistent.
GetSchema uses wrong embedded xml

GetSchema and GetRestrictions have wrong address of embedded
NpgsqlMetaData.xml.
Tests for connection.GetSchema

Using standard names from System.Data.Common.DbMetaDataCollectionNames
BugFix #198 NpgsqlParameter with Type NpgsqlTimeStampTZ is not inserted with TimeZone prefix (e.g. +00)