Fix install instructions and comments

INSTALL.md

@@ -8,9 +8,12 @@ To install SMART-TPL you'll need the following dependencies
 * boost-regex
 * openssl
 * libjit
+* timelib (as shared object file)
 
 Both lemon and flex can usually be found in your distro repositories. Libjit however is often missing, you clone it from http://git.savannah.gnu.org/cgit/libjit.git/
 Installing it however does require yacc (often packaged as bison), texi2html/texinfo. If libjit is in the repository of your distro you won't need these.
 Although use of libjit from your distro repository is probably rather outdated so use of those is discouraged.
 
+Timelib can be downloaded and installed from https://github.com/CopernicaMarketingSoftware/timelib, from which installing is done by `make` and `make install`.
+
 After you have all the required dependencies a simple make and make install should be enough.

src/builtin/parsedtime.h

@@ -61,13 +61,13 @@ class ParsedTime
 
         /**
          *  Get the internal representation
-         *  @return timelib_time *
+         *  @return timelib_tzinfo *
          */
         const timelib_tzinfo *internal() const { return _info; }
 
         /**
-         *  Cast to the internal structur
-         *  @return timelib_tzinfo
+         *  Cast to the internal structure
+         *  @return timelib_tzinfo *
          */
         operator const timelib_tzinfo * () const { return _info; }
     };