Bump soversion

Also, fix writeCommentBeforeValue() iter deref

Move operators; minor fixes

• Some C++ "move" operators.
  • (If these require a bump in the ABI number, please let us know.)
• Fix uninitialized value detected by valgrind. (Thanks to @ya1gaurav for first noticing this.)
• Other minor improvements.
• Moved most READ docs to Wiki.

Meson build

• meson.build
• Minor bug fixes and optimizations
• Improved docs

Require cmake>=3.1

Plus some other build-related changes. I don't think there is anything functionally different from 1.7.7, or even any binary incompatibilities, but the cmake change is significant.

Bump SOVERSION

At the suggestion of Peter Spiess-Knafl, we will bump the SOVERSION independent of the MAJOR.MINOR.MICRO version, in case we break binary compatibility.

Allow non-null-terminated input

• Prevent possible SEGV. (Thanks to @ngg.)
• Add RPATH for OSX libs. (Please let us know if this causes a problem.)

Minor improvements

• Fix locale for decimal points
  • Plus a fix for Android
• int64_t for 64-bit integers
• Optionally suppress space after comma
• Avoid null for empty stringValue
• Fix null ctor/dtor, using a "Meyers Singleton"
  • Thanks to @marklakata and @BillyDonahue in #488 in #490.

Fix pkg-config

• #493

Fix static initialization

• Fix static initialization of null with Myers Singleton. (Thanks @marklakata )
• Fix other minor compiler and installation problems and warnings.
• Fix amalgamated header.

Minor build improvements

0.10.6

0.10.6 <- 0.10.5