Tests: Add support for testing file-based HLSL source code in GTest.

SPV: Handle matrix's OpFConvert vector by vector.

Parser: Add missing vector relational functions for double type.

Build: Minor android compile warning fix

* Fixes a warning - static function being defined but not used.
* Just in case any more code is added to DetachThreadLinux, this will go
  through the same path on both platforms.

Build: fix for -Werror=non-virtual-dtor for Android system builds

Parser: Redeclare gl_ClipDistance/gl_CullDistance should update their array sizes.

SPV: Add capability ImageGatherExtended if necessary.

Use strtoul instead of stoul for Android.

Add badge status for Appveyor build in README.

Configuration for Windows buildbot & fix a bug

We can have multiple instances of the same string, so comparing
const char* is not guaranteed working.

Fixed the failure on VS 2013 with Debug build.

Full stack: Support *precise* qualifier

Use proper precision qualifiers for bitfield build-in functions on ES

fix check for non-positive array size

Rebase to d3d3ce71,update comments, rename a member variable name, fix format issue

This change causes ES shaders to precision qualifiers for build-in functions as defined in ESSL spec. It especially mattersfor functions that are defined as highp or taking a highp.

Fixes vulkanCTS dEQP-VK.glsl.builtin.function.integer.bitfieldreverse.*, where bitfieldReverse() retval was wrongly marked as RelaxedPrecision.

Note: floatBitsToInt/floatBitsToUInt precision is also broken, but in different way - so it is not addressed here.

1. Sink adding noContraction decoration to createBinaryOperation() and
createUnaryOperation().

2. Fix comments.

3. Remove the #define of my delimiter, use global constant char.