add Travis CI config

thanks Lovell

.travis.yml

@@ -0,0 +1,17 @@
+language: cpp
+before_install:
+  - sudo add-apt-repository ppa:lyrasis/precise-backports -y
+  - sudo apt-get update -qq
+  - sudo apt-get install -qq automake gobject-introspection gtk-doc-tools libfftw3-dev libglib2.0-dev libjpeg-turbo8-dev libpng12-dev libwebp-dev libtiff4-dev libxml2-dev swig libmagick++-dev bc libgsf-1-dev libcfitsio3-dev libgsl0-dev libmatio-dev
+before_script:
+  - ./bootstrap.sh
+  - ./configure --enable-debug=no --enable-cxx=yes --without-orc --without-python
+  - make
+  - sudo make install
+  - sudo ldconfig
+  - git clone https://github.com/jcupitt/nip2.git
+  - cd nip2
+  - git checkout $TRAVIS_BRANCH || true
+  - ./bootstrap.sh
+  - ./configure
+script: make check

ChangeLog

@@ -32,6 +32,7 @@
 - vips_system() now uses g_spawn_command_line_sync()
 - added im_tile_cache_random() to help nip2
 - added hough_circle() to vips7 C++ API
+- added Travis CI config, thanks Lovell
 
 6/3/14 started 7.38.6
 - grey ramp minimum was wrong

TODO

@@ -1,3 +1,18 @@
+- quickly wrap the useful bits of mosaicing/
+
+  nip2 uses:
+
+	im_*merge()
+	im_*mosaic()
+	im_global_balancef()
+	im_remosaic()
+	im_match_linear()
+	im_match_linear_search()
+
+  others:
+
+	im__find_*overlap()
+
 - fix vipsthumbnail Chicago.png, again
 
 - can we use postbuild elsewhere? look at use of "preclose" / "written", etc.