added note to .travis.yml about need for hightlight 0.4.4.1

according to Romain a newer one works as well

Author: eddelbuettel

.travis.yml

@@ -23,6 +23,7 @@ before_install:
   - sudo apt-get update -q
 
 install:
+  ## note that we currently depend on highlight 0.4.4.1 from the PPA as 0.4.5 has issues
   - ./travis-tool.sh install_aptget r-cran-runit r-cran-inline r-cran-rbenchmark r-cran-highlight r-cran-pkgkitten
 
 script: 

ChangeLog

@@ -47,7 +47,7 @@
 
         * inst/include/RcppCommon.h: Move headers into major/minor protection
         * inst/include/Rcpp/r/headers.h: New file
- 
+
 2015-03-04  Dirk Eddelbuettel  <[email protected]>
 
         * DESCRIPTION: Release 0.11.5